231333252146440 has 32 divisors (see below), whose sum is σ = 520501481372160. Its totient is φ = 92533005028800.

The previous prime is 231333252146377. The next prime is 231333252146441. The reversal of 231333252146440 is 44641252333132.

It is not an unprimeable number, because it can be changed into a prime (231333252146441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3645295 + ... + 21816385.

It is an arithmetic number, because the mean of its divisors is an integer number (16265671292880).

Almost surely, 2^{231333252146440} is an apocalyptic number.

231333252146440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231333252146440 is an abundant number, since it is smaller than the sum of its proper divisors (289168229225720).

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

231333252146440 is a wasteful number, since it uses less digits than its factorization.

231333252146440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18489373 (or 18489369 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 43.

The spelling of 231333252146440 in words is "two hundred thirty-one trillion, three hundred thirty-three billion, two hundred fifty-two million, one hundred forty-six thousand, four hundred forty".