31032221022 has 96 divisors (see below), whose sum is σ = 77840287200. Its totient is φ = 8830402560.

The previous prime is 31032220979. The next prime is 31032221027. The reversal of 31032221022 is 22012223013.

31032221022 is a `hidden beast` number, since 310 + 322 + 2 + 10 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31032220986 and 31032221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31032221027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1501068 + ... + 1521600.

It is an arithmetic number, because the mean of its divisors is an integer number (810836325).

Almost surely, 2^31032221022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31032221022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38920143600).

31032221022 is an abundant number, since it is smaller than the sum of its proper divisors (46808066178).

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

31032221022 is a wasteful number, since it uses less digits than its factorization.

31032221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21018 (or 21015 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31032221022 its reverse (22012223013), we get a palindrome (53044444035).

The spelling of 31032221022 in words is "thirty-one billion, thirty-two million, two hundred twenty-one thousand, twenty-two".