31242636536 has 32 divisors (see below), whose sum is σ = 59701216080. Its totient is φ = 15324249600.

The previous prime is 31242636493. The next prime is 31242636539. The reversal of 31242636536 is 63563624213.

It is a super-2 number, since 2×31242636536² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31242636493 and 31242636502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31242636539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8246 + ... + 250106.

Almost surely, 2^31242636536 is an apocalyptic number.

It is an amenable number.

31242636536 is a deficient number, since it is larger than the sum of its proper divisors (28458579544).

31242636536 is a wasteful number, since it uses less digits than its factorization.

31242636536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242175 (or 242171 counting only the distinct ones).

The product of its digits is 466560, while the sum is 41.

The spelling of 31242636536 in words is "thirty-one billion, two hundred forty-two million, six hundred thirty-six thousand, five hundred thirty-six".