31371125137 has 6 divisors (see below), whose sum is σ = 34482311234. Its totient is φ = 28519204560.

The previous prime is 31371125111. The next prime is 31371125147. The reversal of 31371125137 is 73152117313.

It can be written as a sum of positive squares in only one way, i.e., 24343488576 + 7027636561 = 156024^2 + 83831^2 .

It is not a de Polignac number, because 31371125137 - 2¹¹ = 31371123089 is a prime.

It is a super-2 number, since 2×31371125137² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31371125147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 129632628 + ... + 129632869.

Almost surely, 2^31371125137 is an apocalyptic number.

It is an amenable number.

31371125137 is a deficient number, since it is larger than the sum of its proper divisors (3111186097).

31371125137 is a wasteful number, since it uses less digits than its factorization.

31371125137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259265519 (or 259265508 counting only the distinct ones).

The product of its digits is 13230, while the sum is 34.

The spelling of 31371125137 in words is "thirty-one billion, three hundred seventy-one million, one hundred twenty-five thousand, one hundred thirty-seven".