257575055 has 4 divisors (see below), whose sum is σ = 309090072. Its totient is φ = 206060040.

The previous prime is 257575037. The next prime is 257575069. The reversal of 257575055 is 550575752.

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

It is not a de Polignac number, because 257575055 - 2¹² = 257570959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25757501 + ... + 25757510.

It is an arithmetic number, because the mean of its divisors is an integer number (77272518).

Almost surely, 2^257575055 is an apocalyptic number.

257575055 is a deficient number, since it is larger than the sum of its proper divisors (51515017).

257575055 is an equidigital number, since it uses as much as digits as its factorization.

257575055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51515016.

The product of its (nonzero) digits is 306250, while the sum is 41.

The square root of 257575055 is about 16049.1449928026. The cubic root of 257575055 is about 636.2599696344.

The spelling of 257575055 in words is "two hundred fifty-seven million, five hundred seventy-five thousand, fifty-five".