131400556 has 24 divisors (see below), whose sum is σ = 268167200. Its totient is φ = 56313936.

The previous prime is 131400553. The next prime is 131400557. The reversal of 131400556 is 655004131.

It is a super-2 number, since 2×131400556² = 34532212234218272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131400556.

It is not an unprimeable number, because it can be changed into a prime (131400553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46515 + ... + 49258.

Almost surely, 2^131400556 is an apocalyptic number.

It is an amenable number.

131400556 is an abundant number, since it is smaller than the sum of its proper divisors (136766644).

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

131400556 is an equidigital number, since it uses as much as digits as its factorization.

131400556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95798 (or 95782 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 131400556 is about 11463.0081566751. The cubic root of 131400556 is about 508.3924210690.

Adding to 131400556 its reverse (655004131), we get a palindrome (786404687).

The spelling of 131400556 in words is "one hundred thirty-one million, four hundred thousand, five hundred fifty-six".