258275681 has 2 divisors, whose sum is σ = 258275682. Its totient is φ = 258275680.

The previous prime is 258275639. The next prime is 258275707. The reversal of 258275681 is 186572852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 257763025 + 512656 = 16055^2 + 716^2 .

It is a cyclic number.

It is not a de Polignac number, because 258275681 - 2¹⁸ = 258013537 is a prime.

It is a super-2 number, since 2×258275681² = 133412654792027522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (258275621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129137840 + 129137841.

It is an arithmetic number, because the mean of its divisors is an integer number (129137841).

Almost surely, 2^258275681 is an apocalyptic number.

It is an amenable number.

258275681 is a deficient number, since it is larger than the sum of its proper divisors (1).

258275681 is an equidigital number, since it uses as much as digits as its factorization.

258275681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 44.

The square root of 258275681 is about 16070.9576877049. The cubic root of 258275681 is about 636.8363410542.

The spelling of 258275681 in words is "two hundred fifty-eight million, two hundred seventy-five thousand, six hundred eighty-one".