31022443420 has 48 divisors (see below), whose sum is σ = 69346519200. Its totient is φ = 11623772160.

The previous prime is 31022443393. The next prime is 31022443423. The reversal of 31022443420 is 2434422013.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31022443423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424821 + ... + 492460.

It is an arithmetic number, because the mean of its divisors is an integer number (1444719150).

Almost surely, 2^31022443420 is an apocalyptic number.

It is an amenable number.

31022443420 is an abundant number, since it is smaller than the sum of its proper divisors (38324075780).

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

31022443420 is a wasteful number, since it uses less digits than its factorization.

31022443420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917398 (or 917396 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 31022443420 its reverse (2434422013), we get a palindrome (33456865433).

The spelling of 31022443420 in words is "thirty-one billion, twenty-two million, four hundred forty-three thousand, four hundred twenty".