257361855 has 32 divisors (see below), whose sum is σ = 421478400. Its totient is φ = 134065152.

The previous prime is 257361851. The next prime is 257361869. The reversal of 257361855 is 558163752.

It is not a de Polignac number, because 257361855 - 2² = 257361851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257361851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113826 + ... + 116064.

It is an arithmetic number, because the mean of its divisors is an integer number (13171200).

Almost surely, 2^257361855 is an apocalyptic number.

257361855 is a deficient number, since it is larger than the sum of its proper divisors (164116545).

257361855 is a wasteful number, since it uses less digits than its factorization.

257361855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2423.

The product of its digits is 252000, while the sum is 42.

The square root of 257361855 is about 16042.5015194015. The cubic root of 257361855 is about 636.0843728300.

The spelling of 257361855 in words is "two hundred fifty-seven million, three hundred sixty-one thousand, eight hundred fifty-five".