258991281 has 12 divisors (see below), whose sum is σ = 375233040. Its totient is φ = 172137240.

The previous prime is 258991273. The next prime is 258991283. The reversal of 258991281 is 182199852.

It is not a de Polignac number, because 258991281 - 2³ = 258991273 is a prime.

It is a super-2 number, since 2×258991281² = 134152967268041922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (258991283) 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, 40491 + ... + 46448.

It is an arithmetic number, because the mean of its divisors is an integer number (31269420).

Almost surely, 2^258991281 is an apocalyptic number.

It is an amenable number.

258991281 is a deficient number, since it is larger than the sum of its proper divisors (116241759).

258991281 is a wasteful number, since it uses less digits than its factorization.

258991281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87276 (or 87273 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 258991281 is about 16093.2060510018. The cubic root of 258991281 is about 637.4239558660.

The spelling of 258991281 in words is "two hundred fifty-eight million, nine hundred ninety-one thousand, two hundred eighty-one".