258265831 has 4 divisors (see below), whose sum is σ = 258578200. Its totient is φ = 257953464.

The previous prime is 258265817. The next prime is 258265849. The reversal of 258265831 is 138562852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 258265831 - 2⁷ = 258265703 is a prime.

It is a super-2 number, since 2×258265831² = 133402478924241122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258265811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154941 + ... + 156598.

It is an arithmetic number, because the mean of its divisors is an integer number (64644550).

Almost surely, 2^258265831 is an apocalyptic number.

258265831 is a deficient number, since it is larger than the sum of its proper divisors (312369).

258265831 is an equidigital number, since it uses as much as digits as its factorization.

258265831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312368.

The product of its digits is 115200, while the sum is 40.

The square root of 258265831 is about 16070.6512313596. The cubic root of 258265831 is about 636.8282451601.

The spelling of 258265831 in words is "two hundred fifty-eight million, two hundred sixty-five thousand, eight hundred thirty-one".