231373081 has 2 divisors, whose sum is σ = 231373082. Its totient is φ = 231373080.

The previous prime is 231373027. The next prime is 231373097. The reversal of 231373081 is 180373132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204747481 + 26625600 = 14309^2 + 5160^2 .

It is a cyclic number.

It is not a de Polignac number, because 231373081 - 2⁹ = 231372569 is a prime.

It is a super-2 number, since 2×231373081² = 107067005222865122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231373381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115686540 + 115686541.

It is an arithmetic number, because the mean of its divisors is an integer number (115686541).

Almost surely, 2^231373081 is an apocalyptic number.

It is an amenable number.

231373081 is a deficient number, since it is larger than the sum of its proper divisors (1).

231373081 is an equidigital number, since it uses as much as digits as its factorization.

231373081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 231373081 is about 15210.9526657603. The cubic root of 231373081 is about 613.9093906194.

The spelling of 231373081 in words is "two hundred thirty-one million, three hundred seventy-three thousand, eighty-one".