157172415 has 8 divisors (see below), whose sum is σ = 251475888. Its totient is φ = 83825280.

The previous prime is 157172381. The next prime is 157172447. The reversal of 157172415 is 514271751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157172415 - 2⁷ = 157172287 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5239066 + ... + 5239095.

It is an arithmetic number, because the mean of its divisors is an integer number (31434486).

Almost surely, 2^157172415 is an apocalyptic number.

157172415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

157172415 is a deficient number, since it is larger than the sum of its proper divisors (94303473).

157172415 is a wasteful number, since it uses less digits than its factorization.

157172415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10478169.

The product of its digits is 9800, while the sum is 33.

The square root of 157172415 is about 12536.8423057802. The cubic root of 157172415 is about 539.6664778614. Note that the first 3 decimals are identical.

The spelling of 157172415 in words is "one hundred fifty-seven million, one hundred seventy-two thousand, four hundred fifteen".