231555920880 has 320 divisors, whose sum is σ = 738368991360. Its totient is φ = 60014592000.

The previous prime is 231555920879. The next prime is 231555920909. The reversal of 231555920880 is 88029555132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 390481864 + ... + 390482456.

It is an arithmetic number, because the mean of its divisors is an integer number (2307403098).

Almost surely, 2^231555920880 is an apocalyptic number.

231555920880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231555920880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369184495680).

231555920880 is an abundant number, since it is smaller than the sum of its proper divisors (506813070480).

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

231555920880 is a wasteful number, since it uses less digits than its factorization.

231555920880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980 (or 974 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 48.

The spelling of 231555920880 in words is "two hundred thirty-one billion, five hundred fifty-five million, nine hundred twenty thousand, eight hundred eighty".