258231969 has 12 divisors (see below), whose sum is σ = 386816976. Its totient is φ = 172154484.

The previous prime is 258231947. The next prime is 258231977. The reversal of 258231969 is 969132852.

258231969 is a `hidden beast` number, since 2 + 582 + 3 + 1 + 9 + 69 = 666.

258231969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 258231969 - 2⁵ = 258231937 is a prime.

It is a super-2 number, since 2×258231969² = 133367499627233922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (258231929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 531099 + ... + 531584.

It is an arithmetic number, because the mean of its divisors is an integer number (32234748).

Almost surely, 2^258231969 is an apocalyptic number.

It is an amenable number.

258231969 is a deficient number, since it is larger than the sum of its proper divisors (128585007).

258231969 is an equidigital number, since it uses as much as digits as its factorization.

258231969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062698 (or 1062686 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 258231969 is about 16069.5976614226. The cubic root of 258231969 is about 636.8004117962.

The spelling of 258231969 in words is "two hundred fifty-eight million, two hundred thirty-one thousand, nine hundred sixty-nine".