157855257 has 16 divisors (see below), whose sum is σ = 267268480. Its totient is φ = 90202896.

The previous prime is 157855171. The next prime is 157855259. The reversal of 157855257 is 752558751.

157855257 is a `hidden beast` number, since 1 + 578 + 55 + 25 + 7 = 666.

It is not a de Polignac number, because 157855257 - 2⁸ = 157855001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157855259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 417418 + ... + 417795.

It is an arithmetic number, because the mean of its divisors is an integer number (16704280).

Almost surely, 2^157855257 is an apocalyptic number.

It is an amenable number.

157855257 is a deficient number, since it is larger than the sum of its proper divisors (109413223).

157855257 is an equidigital number, since it uses as much as digits as its factorization.

157855257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835229 (or 835223 counting only the distinct ones).

The product of its digits is 490000, while the sum is 45.

The square root of 157855257 is about 12564.0462033534. The cubic root of 157855257 is about 540.4468831611.

The spelling of 157855257 in words is "one hundred fifty-seven million, eight hundred fifty-five thousand, two hundred fifty-seven".