157171057 has 4 divisors (see below), whose sum is σ = 157751296. Its totient is φ = 156590820.

The previous prime is 157171043. The next prime is 157171061. The reversal of 157171057 is 750171751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 750171751 = 7 ⋅107167393.

It is a cyclic number.

It is not a de Polignac number, because 157171057 - 2¹⁹ = 156646769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157171037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289713 + ... + 290254.

It is an arithmetic number, because the mean of its divisors is an integer number (39437824).

Almost surely, 2^157171057 is an apocalyptic number.

It is an amenable number.

157171057 is a deficient number, since it is larger than the sum of its proper divisors (580239).

157171057 is an equidigital number, since it uses as much as digits as its factorization.

157171057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580238.

The product of its (nonzero) digits is 8575, while the sum is 34.

The square root of 157171057 is about 12536.7881452946. The cubic root of 157171057 is about 539.6649235827.

The spelling of 157171057 in words is "one hundred fifty-seven million, one hundred seventy-one thousand, fifty-seven".