31013242506 has 12 divisors (see below), whose sum is σ = 67195358802. Its totient is φ = 10337747496.

The previous prime is 31013242489. The next prime is 31013242529. The reversal of 31013242506 is 60524231013.

31013242506 is a `hidden beast` number, since 310 + 1 + 324 + 25 + 0 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20048011281 + 10965231225 = 141591^2 + 104715^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31013242506.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 861478941 + ... + 861478976.

Almost surely, 2^31013242506 is an apocalyptic number.

31013242506 is an abundant number, since it is smaller than the sum of its proper divisors (36182116296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31013242506 is a wasteful number, since it uses less digits than its factorization.

31013242506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722957925 (or 1722957922 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 31013242506 its reverse (60524231013), we get a palindrome (91537473519).

The spelling of 31013242506 in words is "thirty-one billion, thirteen million, two hundred forty-two thousand, five hundred six".