231877791520 has 48 divisors (see below), whose sum is σ = 555987595968. Its totient is φ = 91366767360.

The previous prime is 231877791437. The next prime is 231877791527. The reversal of 231877791520 is 25197778132.

It is not an unprimeable number, because it can be changed into a prime (231877791527) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10804476 + ... + 10825915.

It is an arithmetic number, because the mean of its divisors is an integer number (11583074916).

Almost surely, 2^231877791520 is an apocalyptic number.

231877791520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231877791520 is an abundant number, since it is smaller than the sum of its proper divisors (324109804448).

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

231877791520 is a wasteful number, since it uses less digits than its factorization.

231877791520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21630473 (or 21630465 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 52.

The spelling of 231877791520 in words is "two hundred thirty-one billion, eight hundred seventy-seven million, seven hundred ninety-one thousand, five hundred twenty".