31131230022 has 24 divisors (see below), whose sum is σ = 67461840576. Its totient is φ = 10375408656.

The previous prime is 31131229993. The next prime is 31131230033. The reversal of 31131230022 is 22003213113.

31131230022 is a `hidden beast` number, since 31 + 1 + 312 + 300 + 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 = 31131229977 and 31131230004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21213 + ... + 250424.

It is an arithmetic number, because the mean of its divisors is an integer number (2810910024).

Almost surely, 2^31131230022 is an apocalyptic number.

31131230022 is an abundant number, since it is smaller than the sum of its proper divisors (36330610554).

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

31131230022 is a wasteful number, since it uses less digits than its factorization.

31131230022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278012 (or 278009 counting only the distinct ones).

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

Adding to 31131230022 its reverse (22003213113), we get a palindrome (53134443135).

The spelling of 31131230022 in words is "thirty-one billion, one hundred thirty-one million, two hundred thirty thousand, twenty-two".