258091955 has 16 divisors (see below), whose sum is σ = 338404608. Its totient is φ = 187404000.

The previous prime is 258091879. The next prime is 258091969. The reversal of 258091955 is 559190852.

It is not a de Polignac number, because 258091955 - 2⁸ = 258091699 is a prime.

It is a super-2 number, since 2×258091955² = 133222914471444050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34610 + ... + 41400.

It is an arithmetic number, because the mean of its divisors is an integer number (21150288).

Almost surely, 2^258091955 is an apocalyptic number.

258091955 is a deficient number, since it is larger than the sum of its proper divisors (80312653).

258091955 is a wasteful number, since it uses less digits than its factorization.

258091955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7498.

The product of its (nonzero) digits is 162000, while the sum is 44.

The square root of 258091955 is about 16065.2405833215. The cubic root of 258091955 is about 636.6852994130.

The spelling of 258091955 in words is "two hundred fifty-eight million, ninety-one thousand, nine hundred fifty-five".