31231312022 has 16 divisors (see below), whose sum is σ = 47544235200. Its totient is φ = 15384949320.

The previous prime is 31231312009. The next prime is 31231312039. The reversal of 31231312022 is 22021313213.

It is a junction number, because it is equal to n+sod(n) for n = 31231311985 and 31231312003.

It is a congruent number.

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, 392372 + ... + 465207.

It is an arithmetic number, because the mean of its divisors is an integer number (2971514700).

Almost surely, 2^31231312022 is an apocalyptic number.

31231312022 is a deficient number, since it is larger than the sum of its proper divisors (16312923178).

31231312022 is a wasteful number, since it uses less digits than its factorization.

31231312022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857851.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31231312022 its reverse (22021313213), we get a palindrome (53252625235).

The spelling of 31231312022 in words is "thirty-one billion, two hundred thirty-one million, three hundred twelve thousand, twenty-two".