258494531 has 2 divisors, whose sum is σ = 258494532. Its totient is φ = 258494530.

The previous prime is 258494519. The next prime is 258494567. The reversal of 258494531 is 135494852.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258494531 is a prime.

It is a super-2 number, since 2×258494531² = 133638845113819922, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (258494591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129247265 + 129247266.

It is an arithmetic number, because the mean of its divisors is an integer number (129247266).

Almost surely, 2^258494531 is an apocalyptic number.

258494531 is a deficient number, since it is larger than the sum of its proper divisors (1).

258494531 is an equidigital number, since it uses as much as digits as its factorization.

258494531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 41.

The square root of 258494531 is about 16077.7651121044. The cubic root of 258494531 is about 637.0161647807.

The spelling of 258494531 in words is "two hundred fifty-eight million, four hundred ninety-four thousand, five hundred thirty-one".