257852155 has 24 divisors (see below), whose sum is σ = 344247120. Its totient is φ = 183880320.

The previous prime is 257852143. The next prime is 257852159. The reversal of 257852155 is 551258752.

It is a de Polignac number, because none of the positive numbers 2^k-257852155 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257852159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153661 + ... + 155329.

It is an arithmetic number, because the mean of its divisors is an integer number (14343630).

Almost surely, 2^257852155 is an apocalyptic number.

257852155 is a deficient number, since it is larger than the sum of its proper divisors (86394965).

257852155 is a wasteful number, since it uses less digits than its factorization.

257852155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791 (or 1738 counting only the distinct ones).

The product of its digits is 140000, while the sum is 40.

The square root of 257852155 is about 16057.7755308760. The cubic root of 257852155 is about 636.4880513111.

The spelling of 257852155 in words is "two hundred fifty-seven million, eight hundred fifty-two thousand, one hundred fifty-five".