31320122232 has 48 divisors (see below), whose sum is σ = 91084032360. Its totient is φ = 8948606016.

The previous prime is 31320122221. The next prime is 31320122233. The reversal of 31320122232 is 23222102313.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 31320122199 and 31320122208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320122233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13315203 + ... + 13317554.

Almost surely, 2^31320122232 is an apocalyptic number.

It is an amenable number.

31320122232 is an abundant number, since it is smaller than the sum of its proper divisors (59763910128).

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

31320122232 is a wasteful number, since it uses less digits than its factorization.

31320122232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26632780 (or 26632769 counting only the distinct ones).

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

Adding to 31320122232 its reverse (23222102313), we get a palindrome (54542224545).

The spelling of 31320122232 in words is "thirty-one billion, three hundred twenty million, one hundred twenty-two thousand, two hundred thirty-two".