231157315220 has 48 divisors (see below), whose sum is σ = 522806285568. Its totient is φ = 85344658560.

The previous prime is 231157315133. The next prime is 231157315267. The reversal of 231157315220 is 22513751132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7293047 + ... + 7324673.

It is an arithmetic number, because the mean of its divisors is an integer number (10891797616).

Almost surely, 2^231157315220 is an apocalyptic number.

231157315220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231157315220 is an abundant number, since it is smaller than the sum of its proper divisors (291648970348).

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

231157315220 is a wasteful number, since it uses less digits than its factorization.

231157315220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59760 (or 59758 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The spelling of 231157315220 in words is "two hundred thirty-one billion, one hundred fifty-seven million, three hundred fifteen thousand, two hundred twenty".