231157425240 has 128 divisors (see below), whose sum is σ = 880599744000. Its totient is φ = 52835981184.

The previous prime is 231157425229. The next prime is 231157425253. The reversal of 231157425240 is 42524751132.

231157425240 is a `hidden beast` number, since 2 + 31 + 1 + 574 + 2 + 52 + 4 + 0 = 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 = 231157425195 and 231157425204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15280630 + ... + 15295749.

It is an arithmetic number, because the mean of its divisors is an integer number (6879685500).

Almost surely, 2^231157425240 is an apocalyptic number.

231157425240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231157425240 is an abundant number, since it is smaller than the sum of its proper divisors (649442318760).

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

231157425240 is a wasteful number, since it uses less digits than its factorization.

231157425240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30576406 (or 30576396 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The spelling of 231157425240 in words is "two hundred thirty-one billion, one hundred fifty-seven million, four hundred twenty-five thousand, two hundred forty".