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131318579200 = 21552315171
BaseRepresentation
bin111101001001100110…
…0101000000000000000
3110112221211002000020111
41322103030220000000
54122420024013300
6140154340521104
712326124335404
oct1722314500000
9415854060214
10131318579200
1150767a07206
122154a3b0194
13c4ca116303
1464da665104
1536389c39ba
hex1e93328000

131318579200 has 192 divisors, whose sum is σ = 336235443840. Its totient is φ = 50823168000.

The previous prime is 131318579191. The next prime is 131318579207. The reversal of 131318579200 is 2975813131.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131318579207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25392615 + ... + 25397785.

It is an arithmetic number, because the mean of its divisors is an integer number (1751226270).

Almost surely, 2131318579200 is an apocalyptic number.

131318579200 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 131318579200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168117721920).

131318579200 is an abundant number, since it is smaller than the sum of its proper divisors (204916864640).

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

131318579200 is an frugal number, since it uses more digits than its factorization.

131318579200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5242 (or 5209 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 131318579200 in words is "one hundred thirty-one billion, three hundred eighteen million, five hundred seventy-nine thousand, two hundred".