31130312022 has 12 divisors (see below), whose sum is σ = 67449009420. Its totient is φ = 10376770668.

The previous prime is 31130311997. The next prime is 31130312039. The reversal of 31130312022 is 22021303113.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1729461779 = 31130312022 / (3 + 1 + 1 + 3 + 0 + 3 + 1 + 2 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 31130311986 and 31130312004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 864730872 + ... + 864730907.

It is an arithmetic number, because the mean of its divisors is an integer number (5620750785).

Almost surely, 2^31130312022 is an apocalyptic number.

31130312022 is an abundant number, since it is smaller than the sum of its proper divisors (36318697398).

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

31130312022 is a wasteful number, since it uses less digits than its factorization.

31130312022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729461787 (or 1729461784 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31130312022 its reverse (22021303113), we get a palindrome (53151615135).

The spelling of 31130312022 in words is "thirty-one billion, one hundred thirty million, three hundred twelve thousand, twenty-two".