231072057 has 6 divisors (see below), whose sum is σ = 333770762. Its totient is φ = 154048032.

The previous prime is 231072019. The next prime is 231072073. The reversal of 231072057 is 750270132.

It can be written as a sum of positive squares in only one way, i.e., 208831401 + 22240656 = 14451^2 + 4716^2 .

It is not a de Polignac number, because 231072057 - 2¹⁰ = 231071033 is a prime.

It is a super-2 number, since 2×231072057² = 106788591052422498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231072057.

It is not an unprimeable number, because it can be changed into a prime (231072097) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12837328 + ... + 12837345.

Almost surely, 2^231072057 is an apocalyptic number.

It is an amenable number.

231072057 is a deficient number, since it is larger than the sum of its proper divisors (102698705).

231072057 is a wasteful number, since it uses less digits than its factorization.

231072057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25674679 (or 25674676 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 231072057 is about 15201.0544700031. The cubic root of 231072057 is about 613.6430362941.

The spelling of 231072057 in words is "two hundred thirty-one million, seventy-two thousand, fifty-seven".