131040043400 has 72 divisors (see below), whose sum is σ = 354409858170. Its totient is φ = 44928011520.

The previous prime is 131040043369. The next prime is 131040043411. The reversal of 131040043400 is 4340040131.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 77672575204 + 53367468196 = 278698^2 + 231014^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6675917 + ... + 6695516.

Almost surely, 2^131040043400 is an apocalyptic number.

131040043400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131040043400 is an abundant number, since it is smaller than the sum of its proper divisors (223369814770).

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

131040043400 is a wasteful number, since it uses less digits than its factorization.

131040043400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13371463 (or 13371447 counting only the distinct ones).

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

Adding to 131040043400 its reverse (4340040131), we get a palindrome (135380083531).

The spelling of 131040043400 in words is "one hundred thirty-one billion, forty million, forty-three thousand, four hundred".