31223232988 has 96 divisors (see below), whose sum is σ = 62548899840. Its totient is φ = 13544847360.

The previous prime is 31223232977. The next prime is 31223233049. The reversal of 31223232988 is 88923232213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36179445 + ... + 36180307.

It is an arithmetic number, because the mean of its divisors is an integer number (651551040).

Almost surely, 2^31223232988 is an apocalyptic number.

31223232988 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

31223232988 is an abundant number, since it is smaller than the sum of its proper divisors (31325666852).

31223232988 is a wasteful number, since it uses less digits than its factorization.

31223232988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627 (or 1625 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The spelling of 31223232988 in words is "thirty-one billion, two hundred twenty-three million, two hundred thirty-two thousand, nine hundred eighty-eight".