258287681 has 12 divisors (see below), whose sum is σ = 276108432. Its totient is φ = 241558848.

The previous prime is 258287669. The next prime is 258287719. The reversal of 258287681 is 186782852.

It is not a de Polignac number, because 258287681 - 2²² = 254093377 is a prime.

It is a super-2 number, since 2×258287681² = 133425052312715522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258287611) 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, 44366 + ... + 49848.

It is an arithmetic number, because the mean of its divisors is an integer number (23009036).

Almost surely, 2^258287681 is an apocalyptic number.

It is an amenable number.

258287681 is a deficient number, since it is larger than the sum of its proper divisors (17820751).

258287681 is a wasteful number, since it uses less digits than its factorization.

258287681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5680 (or 5663 counting only the distinct ones).

The product of its digits is 430080, while the sum is 47.

The square root of 258287681 is about 16071.3310276405. The cubic root of 258287681 is about 636.8462037943.

The spelling of 258287681 in words is "two hundred fifty-eight million, two hundred eighty-seven thousand, six hundred eighty-one".