31102012232 has 16 divisors (see below), whose sum is σ = 58364209260. Its totient is φ = 15538223104.

The previous prime is 31102012231. The next prime is 31102012259. The reversal of 31102012232 is 23221020113.

It can be written as a sum of positive squares in 2 ways, for example, as 29229373156 + 1872639076 = 170966^2 + 43274^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31102012232.

It is not an unprimeable number, because it can be changed into a prime (31102012231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1587533 + ... + 1607004.

Almost surely, 2^31102012232 is an apocalyptic number.

It is an amenable number.

31102012232 is a deficient number, since it is larger than the sum of its proper divisors (27262197028).

31102012232 is a wasteful number, since it uses less digits than its factorization.

31102012232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3195760 (or 3195756 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31102012232 its reverse (23221020113), we get a palindrome (54323032345).

The spelling of 31102012232 in words is "thirty-one billion, one hundred two million, twelve thousand, two hundred thirty-two".