258073531 has 2 divisors, whose sum is σ = 258073532. Its totient is φ = 258073530.

The previous prime is 258073471. The next prime is 258073553. The reversal of 258073531 is 135370852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 258073531 - 2²³ = 249684923 is a prime.

It is a super-2 number, since 2×258073531² = 133203894805615922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (258073591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129036765 + 129036766.

It is an arithmetic number, because the mean of its divisors is an integer number (129036766).

Almost surely, 2^258073531 is an apocalyptic number.

258073531 is a deficient number, since it is larger than the sum of its proper divisors (1).

258073531 is an equidigital number, since it uses as much as digits as its factorization.

258073531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 258073531 is about 16064.6671611957. The cubic root of 258073531 is about 636.6701490388.

The spelling of 258073531 in words is "two hundred fifty-eight million, seventy-three thousand, five hundred thirty-one".