31371130372 has 6 divisors (see below), whose sum is σ = 54899478158. Its totient is φ = 15685565184.

The previous prime is 31371130339. The next prime is 31371130391. The reversal of 31371130372 is 27303117313.

It can be written as a sum of positive squares in only one way, i.e., 25890097216 + 5481033156 = 160904^2 + 74034^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3921391293 + ... + 3921391300.

Almost surely, 2^31371130372 is an apocalyptic number.

It is an amenable number.

31371130372 is a deficient number, since it is larger than the sum of its proper divisors (23528347786).

31371130372 is a wasteful number, since it uses less digits than its factorization.

31371130372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7842782597 (or 7842782595 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 31.

Adding to 31371130372 its reverse (27303117313), we get a palindrome (58674247685).

The spelling of 31371130372 in words is "thirty-one billion, three hundred seventy-one million, one hundred thirty thousand, three hundred seventy-two".