258208481 has 2 divisors, whose sum is σ = 258208482. Its totient is φ = 258208480.

The previous prime is 258208451. The next prime is 258208493. The reversal of 258208481 is 184802852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255712081 + 2496400 = 15991^2 + 1580^2 .

It is a cyclic number.

It is not a de Polignac number, because 258208481 - 2²² = 254014177 is a prime.

It is a super-2 number, since 2×258208481² = 133343239320654722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (258208451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129104240 + 129104241.

It is an arithmetic number, because the mean of its divisors is an integer number (129104241).

Almost surely, 2^258208481 is an apocalyptic number.

It is an amenable number.

258208481 is a deficient number, since it is larger than the sum of its proper divisors (1).

258208481 is an equidigital number, since it uses as much as digits as its factorization.

258208481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40960, while the sum is 38.

The square root of 258208481 is about 16068.8668237683. The cubic root of 258208481 is about 636.7811040634.

The spelling of 258208481 in words is "two hundred fifty-eight million, two hundred eight thousand, four hundred eighty-one".