257855955 has 16 divisors (see below), whose sum is σ = 471508224. Its totient is φ = 117876960.

The previous prime is 257855953. The next prime is 257855957. The reversal of 257855955 is 559558752.

It is an interprime number because it is at equal distance from previous prime (257855953) and next prime (257855957).

It is not a de Polignac number, because 257855955 - 2¹ = 257855953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257855898 and 257855907.

It is not an unprimeable number, because it can be changed into a prime (257855953) 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 in 15 ways as a sum of consecutive naturals, for example, 1227781 + ... + 1227990.

It is an arithmetic number, because the mean of its divisors is an integer number (29469264).

Almost surely, 2^257855955 is an apocalyptic number.

257855955 is a deficient number, since it is larger than the sum of its proper divisors (213652269).

257855955 is a wasteful number, since it uses less digits than its factorization.

257855955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455786.

The product of its digits is 3150000, while the sum is 51.

The square root of 257855955 is about 16057.8938531801. The cubic root of 257855955 is about 636.4911779642.

The spelling of 257855955 in words is "two hundred fifty-seven million, eight hundred fifty-five thousand, nine hundred fifty-five".