157138117 has 4 divisors (see below), whose sum is σ = 160970796. Its totient is φ = 153305440.

The previous prime is 157138109. The next prime is 157138127. The reversal of 157138117 is 711831751.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60980481 + 96157636 = 7809^2 + 9806^2 .

It is a cyclic number.

It is not a de Polignac number, because 157138117 - 2³ = 157138109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157138127) 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, 1916278 + ... + 1916359.

It is an arithmetic number, because the mean of its divisors is an integer number (40242699).

Almost surely, 2^157138117 is an apocalyptic number.

It is an amenable number.

157138117 is a deficient number, since it is larger than the sum of its proper divisors (3832679).

157138117 is an equidigital number, since it uses as much as digits as its factorization.

157138117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832678.

The product of its digits is 5880, while the sum is 34.

The square root of 157138117 is about 12535.4743428400. The cubic root of 157138117 is about 539.6272198542.

Adding to 157138117 its reverse (711831751), we get a palindrome (868969868).

The spelling of 157138117 in words is "one hundred fifty-seven million, one hundred thirty-eight thousand, one hundred seventeen".