258085381 has 6 divisors (see below), whose sum is σ = 274160210. Its totient is φ = 242903616.

The previous prime is 258085361. The next prime is 258085403. The reversal of 258085381 is 183580852.

It can be written as a sum of positive squares in 3 ways, for example, as 200477281 + 57608100 = 14159^2 + 7590^2 .

It is not a de Polignac number, because 258085381 - 2²³ = 249696773 is a prime.

It is a super-2 number, since 2×258085381² = 133216127771830322, 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 (258085351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 446226 + ... + 446803.

Almost surely, 2^258085381 is an apocalyptic number.

It is an amenable number.

258085381 is a deficient number, since it is larger than the sum of its proper divisors (16074829).

258085381 is an equidigital number, since it uses as much as digits as its factorization.

258085381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893063 (or 893046 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 40.

The square root of 258085381 is about 16065.0359787957. The cubic root of 258085381 is about 636.6798935817.

The spelling of 258085381 in words is "two hundred fifty-eight million, eighty-five thousand, three hundred eighty-one".