157173905 has 16 divisors (see below), whose sum is σ = 217572480. Its totient is φ = 106766592.

The previous prime is 157173883. The next prime is 157173917. The reversal of 157173905 is 509371751.

It is a cyclic number.

It is not a de Polignac number, because 157173905 - 2¹² = 157169809 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17240 + ... + 24729.

It is an arithmetic number, because the mean of its divisors is an integer number (13598280).

Almost surely, 2^157173905 is an apocalyptic number.

It is an amenable number.

157173905 is a deficient number, since it is larger than the sum of its proper divisors (60398575).

157173905 is a wasteful number, since it uses less digits than its factorization.

157173905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42088.

The product of its (nonzero) digits is 33075, while the sum is 38.

The square root of 157173905 is about 12536.9017304915. The cubic root of 157173905 is about 539.6681832084.

The spelling of 157173905 in words is "one hundred fifty-seven million, one hundred seventy-three thousand, nine hundred five".