31123222032 has 40 divisors (see below), whose sum is σ = 91887608896. Its totient is φ = 8892349056.

The previous prime is 31123222027. The next prime is 31123222049. The reversal of 31123222032 is 23022232113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46313983 + ... + 46314654.

Almost surely, 2^31123222032 is an apocalyptic number.

It is an amenable number.

31123222032 is an abundant number, since it is smaller than the sum of its proper divisors (60764386864).

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

31123222032 is a wasteful number, since it uses less digits than its factorization.

31123222032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92628655 (or 92628649 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31123222032 its reverse (23022232113), we get a palindrome (54145454145).

The spelling of 31123222032 in words is "thirty-one billion, one hundred twenty-three million, two hundred twenty-two thousand, thirty-two".