31000020322 has 16 divisors (see below), whose sum is σ = 48304771200. Its totient is φ = 14902903120.

The previous prime is 31000020299. The next prime is 31000020397. The reversal of 31000020322 is 22302000013.

It is a happy number.

It is a super-2 number, since 2×31000020322² (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 7 ways as a sum of consecutive naturals, for example, 1104304 + ... + 1132027.

It is an arithmetic number, because the mean of its divisors is an integer number (3019048200).

Almost surely, 2^31000020322 is an apocalyptic number.

31000020322 is a deficient number, since it is larger than the sum of its proper divisors (17304750878).

31000020322 is a wasteful number, since it uses less digits than its factorization.

31000020322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236601.

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 31000020322 its reverse (22302000013), we get a palindrome (53302020335).

The spelling of 31000020322 in words is "thirty-one billion, twenty thousand, three hundred twenty-two".