258325555 has 4 divisors (see below), whose sum is σ = 309990672. Its totient is φ = 206660440.

The previous prime is 258325549. The next prime is 258325567. The reversal of 258325555 is 555523852.

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

It is not a de Polignac number, because 258325555 - 2⁷ = 258325427 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 25832551 + ... + 25832560.

It is an arithmetic number, because the mean of its divisors is an integer number (77497668).

Almost surely, 2^258325555 is an apocalyptic number.

258325555 is a deficient number, since it is larger than the sum of its proper divisors (51665117).

258325555 is an equidigital number, since it uses as much as digits as its factorization.

258325555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51665116.

The product of its digits is 300000, while the sum is 40.

The square root of 258325555 is about 16072.5092938222. The cubic root of 258325555 is about 636.8773302424.

The spelling of 258325555 in words is "two hundred fifty-eight million, three hundred twenty-five thousand, five hundred fifty-five".