157157217 has 24 divisors (see below), whose sum is σ = 265472064. Its totient is φ = 87714144.

The previous prime is 157157207. The next prime is 157157219. The reversal of 157157217 is 712751751.

157157217 is a `hidden beast` number, since 1 + 5 + 71 + 572 + 17 = 666.

It is not a de Polignac number, because 157157217 - 2⁴ = 157157201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157157219) 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 23 ways as a sum of consecutive naturals, for example, 26298 + ... + 31715.

It is an arithmetic number, because the mean of its divisors is an integer number (11061336).

Almost surely, 2^157157217 is an apocalyptic number.

It is an amenable number.

157157217 is a deficient number, since it is larger than the sum of its proper divisors (108314847).

157157217 is a wasteful number, since it uses less digits than its factorization.

157157217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58069 (or 58066 counting only the distinct ones).

The product of its digits is 17150, while the sum is 36.

The square root of 157157217 is about 12536.2361576352. The cubic root of 157157217 is about 539.6490827065.

The spelling of 157157217 in words is "one hundred fifty-seven million, one hundred fifty-seven thousand, two hundred seventeen".