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13131300155640 = 2335172385198323
BaseRepresentation
bin1011111100010101111001…
…1110110011000011111000
31201111100011212220112010220
42333011132132303003320
53210120400314440030
643532234102340040
72523463600455102
oct277053636630370
951440155815126
1013131300155640
114202a53673017
121580b25a2a620
137433790209c4
143357b6052572
1517b89671ba10
hexbf15e7b30f8

13131300155640 has 192 divisors, whose sum is σ = 41858792184960. Its totient is φ = 3294809548800.

The previous prime is 13131300155557. The next prime is 13131300155671. The reversal of 13131300155640 is 4655100313131.

It is a happy number.

It is a super-2 number, since 2×131313001556402 (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133503519 + ... + 133601841.

It is an arithmetic number, because the mean of its divisors is an integer number (218014542630).

Almost surely, 213131300155640 is an apocalyptic number.

13131300155640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13131300155640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20929396092480).

13131300155640 is an abundant number, since it is smaller than the sum of its proper divisors (28727492029320).

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

13131300155640 is a wasteful number, since it uses less digits than its factorization.

13131300155640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102222 (or 102201 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

Adding to 13131300155640 its reverse (4655100313131), we get a palindrome (17786400468771).

The spelling of 13131300155640 in words is "thirteen trillion, one hundred thirty-one billion, three hundred million, one hundred fifty-five thousand, six hundred forty".