157505913 has 12 divisors (see below), whose sum is σ = 228654400. Its totient is φ = 104475096.

The previous prime is 157505911. The next prime is 157505917. The reversal of 157505913 is 319505751.

157505913 is a `hidden beast` number, since 15 + 7 + 50 + 591 + 3 = 666.

It is not a de Polignac number, because 157505913 - 2¹ = 157505911 is a prime.

It is a super-2 number, since 2×157505913² = 49616225259927138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157505911) 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, 42181 + ... + 45762.

Almost surely, 2^157505913 is an apocalyptic number.

It is an amenable number.

157505913 is a deficient number, since it is larger than the sum of its proper divisors (71148487).

157505913 is a wasteful number, since it uses less digits than its factorization.

157505913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88148 (or 88145 counting only the distinct ones).

The product of its (nonzero) digits is 23625, while the sum is 36.

The square root of 157505913 is about 12550.1359753590. The cubic root of 157505913 is about 540.0479072723.

The spelling of 157505913 in words is "one hundred fifty-seven million, five hundred five thousand, nine hundred thirteen".