231531421253996 has 24 divisors (see below), whose sum is σ = 405520420651920. Its totient is φ = 115668448924352.

The previous prime is 231531421253981. The next prime is 231531421254017. The reversal of 231531421253996 is 699352124135132.

It is a super-2 number, since 2×231531421253996² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190789775 + ... + 191999481.

It is an arithmetic number, because the mean of its divisors is an integer number (16896684193830).

Almost surely, 2^{231531421253996} is an apocalyptic number.

It is an amenable number.

231531421253996 is a deficient number, since it is larger than the sum of its proper divisors (173988999397924).

231531421253996 is a wasteful number, since it uses less digits than its factorization.

231531421253996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249873 (or 1249871 counting only the distinct ones).

The product of its digits is 10497600, while the sum is 56.

The spelling of 231531421253996 in words is "two hundred thirty-one trillion, five hundred thirty-one billion, four hundred twenty-one million, two hundred fifty-three thousand, nine hundred ninety-six".