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12531131303200 = 255222769004027
BaseRepresentation
bin1011011001011010000110…
…1000010100010100100000
31122100222001002022212122121
42312112201220110110200
53120302224103200300
642352420001114024
72432226054420646
oct266264150242440
948328032285577
1012531131303200
113aa1471a31154
1214a474a628914
136cb8b03c3613
1431471d5b7196
1516ae6bb4881a
hexb65a1a14520

12531131303200 has 72 divisors (see below), whose sum is σ = 30726389603952. Its totient is φ = 4990371160320.

The previous prime is 12531131303191. The next prime is 12531131303269. The reversal of 12531131303200 is 230313113521.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34320414 + ... + 34683613.

It is an arithmetic number, because the mean of its divisors is an integer number (426755411166).

Almost surely, 212531131303200 is an apocalyptic number.

12531131303200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12531131303200 is an abundant number, since it is smaller than the sum of its proper divisors (18195258300752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12531131303200 is a wasteful number, since it uses less digits than its factorization.

12531131303200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69004274 (or 69004261 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 25.

Adding to 12531131303200 its reverse (230313113521), we get a palindrome (12761444416721).

The spelling of 12531131303200 in words is "twelve trillion, five hundred thirty-one billion, one hundred thirty-one million, three hundred three thousand, two hundred".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 80 100 160 200 227 400 454 800 908 1135 1816 2270 3632 4540 5675 7264 9080 11350 18160 22700 36320 45400 90800 181600 69004027 138008054 276016108 345020135 552032216 690040270 1104064432 1380080540 1725100675 2208128864 2760161080 3450201350 5520322160 6900402700 11040644320 13800805400 15663914129 27601610800 31327828258 55203221600 62655656516 78319570645 125311313032 156639141290 250622626064 313278282580 391597853225 501245252128 626556565160 783195706450 1253113130320 1566391412900 2506226260640 3132782825800 6265565651600 12531131303200