31222413020 has 48 divisors (see below), whose sum is σ = 67554926208. Its totient is φ = 12115031040.

The previous prime is 31222412989. The next prime is 31222413031. The reversal of 31222413020 is 2031422213.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31222412983 and 31222413001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40751 + ... + 253190.

It is an arithmetic number, because the mean of its divisors is an integer number (1407394296).

Almost surely, 2^31222413020 is an apocalyptic number.

It is an amenable number.

31222413020 is an abundant number, since it is smaller than the sum of its proper divisors (36332513188).

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

31222413020 is a wasteful number, since it uses less digits than its factorization.

31222413020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294110 (or 294108 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31222413020 its reverse (2031422213), we get a palindrome (33253835233).

It can be divided in two parts, 3122 and 2413020, that added together give a palindrome (2416142).

The spelling of 31222413020 in words is "thirty-one billion, two hundred twenty-two million, four hundred thirteen thousand, twenty".