258085085 has 4 divisors (see below), whose sum is σ = 309702108. Its totient is φ = 206468064.

The previous prime is 258085081. The next prime is 258085099. The reversal of 258085085 is 580580852.

258085085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 156700324 + 101384761 = 12518^2 + 10069^2 .

It is a cyclic number.

It is not a de Polignac number, because 258085085 - 2² = 258085081 is a prime.

It is a super-2 number, since 2×258085085² = 133215822198914450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258085081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25808504 + ... + 25808513.

It is an arithmetic number, because the mean of its divisors is an integer number (77425527).

Almost surely, 2^258085085 is an apocalyptic number.

It is an amenable number.

258085085 is a deficient number, since it is larger than the sum of its proper divisors (51617023).

258085085 is an equidigital number, since it uses as much as digits as its factorization.

258085085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51617022.

The product of its (nonzero) digits is 128000, while the sum is 41.

The square root of 258085085 is about 16065.0267662398. The cubic root of 258085085 is about 636.6796501773.

The spelling of 258085085 in words is "two hundred fifty-eight million, eighty-five thousand, eighty-five".