231257071827 has 18 divisors (see below), whose sum is σ = 352544257572. Its totient is φ = 146057095944.

The previous prime is 231257071817. The next prime is 231257071841. The reversal of 231257071827 is 728170752132.

231257071827 is a `hidden beast` number, since 2 + 3 + 1 + 2 + 570 + 71 + 8 + 2 + 7 = 666.

It is not a de Polignac number, because 231257071827 - 2¹⁴ = 231257055443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231257071807) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 35585713 + ... + 35592210.

Almost surely, 2^231257071827 is an apocalyptic number.

231257071827 is a deficient number, since it is larger than the sum of its proper divisors (121287185745).

231257071827 is a wasteful number, since it uses less digits than its factorization.

231257071827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71177967 (or 71177945 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The spelling of 231257071827 in words is "two hundred thirty-one billion, two hundred fifty-seven million, seventy-one thousand, eight hundred twenty-seven".