137431131 has 4 divisors (see below), whose sum is σ = 183241512. Its totient is φ = 91620752.

The previous prime is 137431097. The next prime is 137431157. The reversal of 137431131 is 131134731.

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

It is a cyclic number.

It is not a de Polignac number, because 137431131 - 2⁹ = 137430619 is a prime.

It is a super-2 number, since 2×137431131² = 37774631535878322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (137431171) 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, 22905186 + ... + 22905191.

It is an arithmetic number, because the mean of its divisors is an integer number (45810378).

Almost surely, 2^137431131 is an apocalyptic number.

137431131 is a deficient number, since it is larger than the sum of its proper divisors (45810381).

137431131 is an equidigital number, since it uses as much as digits as its factorization.

137431131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45810380.

The product of its digits is 756, while the sum is 24.

The square root of 137431131 is about 11723.1024477311. The cubic root of 137431131 is about 516.0538710957.

Adding to 137431131 its reverse (131134731), we get a palindrome (268565862).

The spelling of 137431131 in words is "one hundred thirty-seven million, four hundred thirty-one thousand, one hundred thirty-one".