157157387 has 4 divisors (see below), whose sum is σ = 160990536. Its totient is φ = 153324240.

The previous prime is 157157381. The next prime is 157157423. The reversal of 157157387 is 783751751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783751751 = 317 ⋅2472403.

It is a cyclic number.

It is not a de Polignac number, because 157157387 - 2⁶ = 157157323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157157381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1916513 + ... + 1916594.

It is an arithmetic number, because the mean of its divisors is an integer number (40247634).

Almost surely, 2^157157387 is an apocalyptic number.

157157387 is a deficient number, since it is larger than the sum of its proper divisors (3833149).

157157387 is an equidigital number, since it uses as much as digits as its factorization.

157157387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833148.

The product of its digits is 205800, while the sum is 44.

The square root of 157157387 is about 12536.2429379779. The cubic root of 157157387 is about 539.6492772894.

The spelling of 157157387 in words is "one hundred fifty-seven million, one hundred fifty-seven thousand, three hundred eighty-seven".