157031139 has 4 divisors (see below), whose sum is σ = 209374856. Its totient is φ = 104687424.

The previous prime is 157031137. The next prime is 157031179. The reversal of 157031139 is 931130751.

It is a happy number.

157031139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 157031139 - 2¹ = 157031137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157031137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26171854 + ... + 26171859.

It is an arithmetic number, because the mean of its divisors is an integer number (52343714).

Almost surely, 2^157031139 is an apocalyptic number.

157031139 is a deficient number, since it is larger than the sum of its proper divisors (52343717).

157031139 is an equidigital number, since it uses as much as digits as its factorization.

157031139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52343716.

The product of its (nonzero) digits is 2835, while the sum is 30.

The square root of 157031139 is about 12531.2066059099. The cubic root of 157031139 is about 539.5047345166.

The spelling of 157031139 in words is "one hundred fifty-seven million, thirty-one thousand, one hundred thirty-nine".