231381819394945 has 32 divisors (see below), whose sum is σ = 293652432898560. Its totient is φ = 174834880247040.

The previous prime is 231381819394889. The next prime is 231381819394981. The reversal of 231381819394945 is 549493918183132.

It is not a de Polignac number, because 231381819394945 - 2²³ = 231381811006337 is a prime.

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, 151514215 + ... + 153033724.

It is an arithmetic number, because the mean of its divisors is an integer number (9176638528080).

Almost surely, 2^{231381819394945} is an apocalyptic number.

It is an amenable number.

231381819394945 is a deficient number, since it is larger than the sum of its proper divisors (62270613503615).

231381819394945 is a wasteful number, since it uses less digits than its factorization.

231381819394945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304548105.

The product of its digits is 201553920, while the sum is 70.

The spelling of 231381819394945 in words is "two hundred thirty-one trillion, three hundred eighty-one billion, eight hundred nineteen million, three hundred ninety-four thousand, nine hundred forty-five".