231355252240 has 60 divisors (see below), whose sum is σ = 625721537196. Its totient is φ = 79321799424.

The previous prime is 231355252159. The next prime is 231355252259. The reversal of 231355252240 is 42252553132.

It can be written as a sum of positive squares in 2 ways, for example, as 86090601744 + 145264650496 = 293412^2 + 381136^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231355252196 and 231355252205.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29505679 + ... + 29513518.

Almost surely, 2^231355252240 is an apocalyptic number.

231355252240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231355252240 is an abundant number, since it is smaller than the sum of its proper divisors (394366284956).

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

231355252240 is a wasteful number, since it uses less digits than its factorization.

231355252240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59019224 (or 59019211 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 34.

The spelling of 231355252240 in words is "two hundred thirty-one billion, three hundred fifty-five million, two hundred fifty-two thousand, two hundred forty".