31222556490 has 32 divisors (see below), whose sum is σ = 79342027200. Its totient is φ = 7836249344.

The previous prime is 31222556489. The next prime is 31222556587. The reversal of 31222556490 is 9465522213.

It is a super-2 number, since 2×31222556490² (a number of 22 digits) contains 22 as substring.

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, 30609840 + ... + 30610859.

It is an arithmetic number, because the mean of its divisors is an integer number (2479438350).

Almost surely, 2^31222556490 is an apocalyptic number.

31222556490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31222556490 is an abundant number, since it is smaller than the sum of its proper divisors (48119470710).

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

31222556490 is a wasteful number, since it uses less digits than its factorization.

31222556490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61220726.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 31222556490 in words is "thirty-one billion, two hundred twenty-two million, five hundred fifty-six thousand, four hundred ninety".