131731355340 has 72 divisors (see below), whose sum is σ = 430322435088. Its totient is φ = 32426179200.

The previous prime is 131731355339. The next prime is 131731355381. The reversal of 131731355340 is 43553137131.

131731355340 is a `hidden beast` number, since 1 + 31 + 7 + 31 + 3 + 553 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 131731355295 and 131731355304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28145386 + ... + 28150065.

Almost surely, 2^131731355340 is an apocalyptic number.

131731355340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131731355340 is an abundant number, since it is smaller than the sum of its proper divisors (298591079748).

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

131731355340 is a wasteful number, since it uses less digits than its factorization.

131731355340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56295479 (or 56295474 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 36.

The spelling of 131731355340 in words is "one hundred thirty-one billion, seven hundred thirty-one million, three hundred fifty-five thousand, three hundred forty".