231399263 has 2 divisors, whose sum is σ = 231399264. Its totient is φ = 231399262.

The previous prime is 231399247. The next prime is 231399293. The reversal of 231399263 is 362993132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231399263 - 2⁴ = 231399247 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231399293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115699631 + 115699632.

It is an arithmetic number, because the mean of its divisors is an integer number (115699632).

Almost surely, 2^231399263 is an apocalyptic number.

231399263 is a deficient number, since it is larger than the sum of its proper divisors (1).

231399263 is an equidigital number, since it uses as much as digits as its factorization.

231399263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 38.

The square root of 231399263 is about 15211.8132712705. The cubic root of 231399263 is about 613.9325462509.

The spelling of 231399263 in words is "two hundred thirty-one million, three hundred ninety-nine thousand, two hundred sixty-three".