157165725 has 24 divisors (see below), whose sum is σ = 260563680. Its totient is φ = 83590720.

The previous prime is 157165721. The next prime is 157165727. The reversal of 157165725 is 527561751.

157165725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157165725 - 2² = 157165721 is a prime.

It is a super-2 number, since 2×157165725² = 49402130229551250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157165721) 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, 26482 + ... + 31868.

It is an arithmetic number, because the mean of its divisors is an integer number (10856820).

Almost surely, 2^157165725 is an apocalyptic number.

157165725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157165725 is a deficient number, since it is larger than the sum of its proper divisors (103397955).

157165725 is a wasteful number, since it uses less digits than its factorization.

157165725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5789 (or 5784 counting only the distinct ones).

The product of its digits is 73500, while the sum is 39.

The square root of 157165725 is about 12536.5754893432. The cubic root of 157165725 is about 539.6588208350.

The spelling of 157165725 in words is "one hundred fifty-seven million, one hundred sixty-five thousand, seven hundred twenty-five".