231031540051120 has 160 divisors (see below), whose sum is σ = 569716360997760. Its totient is φ = 86941739089920.

The previous prime is 231031540051079. The next prime is 231031540051139. The reversal of 231031540051120 is 21150045130132.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4715963586 + ... + 4716012574.

It is an arithmetic number, because the mean of its divisors is an integer number (3560727256236).

Almost surely, 2^{231031540051120} is an apocalyptic number.

231031540051120 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 231031540051120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284858180498880).

231031540051120 is an abundant number, since it is smaller than the sum of its proper divisors (338684820946640).

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

231031540051120 is a wasteful number, since it uses less digits than its factorization.

231031540051120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91103 (or 91097 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 231031540051120 its reverse (21150045130132), we get a palindrome (252181585181252).

The spelling of 231031540051120 in words is "two hundred thirty-one trillion, thirty-one billion, five hundred forty million, fifty-one thousand, one hundred twenty".