31143060637 has 16 divisors (see below), whose sum is σ = 34072983280. Its totient is φ = 28291203072.

The previous prime is 31143060593. The next prime is 31143060649. The reversal of 31143060637 is 73606034113.

It can be written as a sum of positive squares in 8 ways, for example, as 910892761 + 30232167876 = 30181^2 + 173874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31143060637 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 (31143064637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397789 + ... + 469597.

It is an arithmetic number, because the mean of its divisors is an integer number (2129561455).

Almost surely, 2^31143060637 is an apocalyptic number.

It is an amenable number.

31143060637 is a deficient number, since it is larger than the sum of its proper divisors (2929922643).

31143060637 is a wasteful number, since it uses less digits than its factorization.

31143060637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72352.

The product of its (nonzero) digits is 27216, while the sum is 34.

The spelling of 31143060637 in words is "thirty-one billion, one hundred forty-three million, sixty thousand, six hundred thirty-seven".