157319217 has 12 divisors (see below), whose sum is σ = 247897104. Its totient is φ = 95344920.

The previous prime is 157319191. The next prime is 157319219. The reversal of 157319217 is 712913751.

It is not a de Polignac number, because 157319217 - 2⁷ = 157319089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157319219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 794443 + ... + 794640.

It is an arithmetic number, because the mean of its divisors is an integer number (20658092).

Almost surely, 2^157319217 is an apocalyptic number.

It is an amenable number.

157319217 is a deficient number, since it is larger than the sum of its proper divisors (90577887).

157319217 is a wasteful number, since it uses less digits than its factorization.

157319217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589100 (or 1589097 counting only the distinct ones).

The product of its digits is 13230, while the sum is 36.

The square root of 157319217 is about 12542.6957628733. The cubic root of 157319217 is about 539.8344451336.

The spelling of 157319217 in words is "one hundred fifty-seven million, three hundred nineteen thousand, two hundred seventeen".