131320402400 has 72 divisors (see below), whose sum is σ = 349730131464. Its totient is φ = 47752870400.

The previous prime is 131320402397. The next prime is 131320402427. The reversal of 131320402400 is 4204023131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7452587 + ... + 7470186.

It is an arithmetic number, because the mean of its divisors is an integer number (4857362937).

Almost surely, 2^131320402400 is an apocalyptic number.

131320402400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131320402400 is an abundant number, since it is smaller than the sum of its proper divisors (218409729064).

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

131320402400 is a wasteful number, since it uses less digits than its factorization.

131320402400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14922804 (or 14922791 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 131320402400 its reverse (4204023131), we get a palindrome (135524425531).

The spelling of 131320402400 in words is "one hundred thirty-one billion, three hundred twenty million, four hundred two thousand, four hundred".