157657171 has 4 divisors (see below), whose sum is σ = 180179632. Its totient is φ = 135134712.

The previous prime is 157657169. The next prime is 157657211. The reversal of 157657171 is 171756751.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 157657171 - 2¹ = 157657169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157657121) 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 3 ways as a sum of consecutive naturals, for example, 11261220 + ... + 11261233.

It is an arithmetic number, because the mean of its divisors is an integer number (45044908).

Almost surely, 2^157657171 is an apocalyptic number.

157657171 is a deficient number, since it is larger than the sum of its proper divisors (22522461).

157657171 is an equidigital number, since it uses as much as digits as its factorization.

157657171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22522460.

The product of its digits is 51450, while the sum is 40.

The square root of 157657171 is about 12556.1606791248. The cubic root of 157657171 is about 540.2207270943.

The spelling of 157657171 in words is "one hundred fifty-seven million, six hundred fifty-seven thousand, one hundred seventy-one".