157391915 has 16 divisors (see below), whose sum is σ = 200344320. Its totient is φ = 118366560.

The previous prime is 157391887. The next prime is 157391917. The reversal of 157391915 is 519193751.

It is not a de Polignac number, because 157391915 - 2⁶ = 157391851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157391917) 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 15 ways as a sum of consecutive naturals, for example, 6122 + ... + 18768.

It is an arithmetic number, because the mean of its divisors is an integer number (12521520).

Almost surely, 2^157391915 is an apocalyptic number.

157391915 is a deficient number, since it is larger than the sum of its proper divisors (42952405).

157391915 is a wasteful number, since it uses less digits than its factorization.

157391915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12802.

The product of its digits is 42525, while the sum is 41.

The square root of 157391915 is about 12545.5934494945. The cubic root of 157391915 is about 539.9175857308.

The spelling of 157391915 in words is "one hundred fifty-seven million, three hundred ninety-one thousand, nine hundred fifteen".