31137024532 has 6 divisors (see below), whose sum is σ = 54489792938. Its totient is φ = 15568512264.

The previous prime is 31137024521. The next prime is 31137024533. The reversal of 31137024532 is 23542073113.

It can be written as a sum of positive squares in only one way, i.e., 23358842896 + 7778181636 = 152836^2 + 88194^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31137024494 and 31137024503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31137024533) 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 as a sum of consecutive naturals, namely, 3892128063 + ... + 3892128070.

Almost surely, 2^31137024532 is an apocalyptic number.

It is an amenable number.

31137024532 is a deficient number, since it is larger than the sum of its proper divisors (23352768406).

31137024532 is a wasteful number, since it uses less digits than its factorization.

31137024532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7784256137 (or 7784256135 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

Adding to 31137024532 its reverse (23542073113), we get a palindrome (54679097645).

The spelling of 31137024532 in words is "thirty-one billion, one hundred thirty-seven million, twenty-four thousand, five hundred thirty-two".