31130020322 has 64 divisors (see below), whose sum is σ = 51527889504. Its totient is φ = 14047088640.

The previous prime is 31130020307. The next prime is 31130020343. The reversal of 31130020322 is 22302003113.

It can be written as a sum of positive squares in 16 ways, for example, as 2505102601 + 28624917721 = 50051^2 + 169189^2 .

It is a super-3 number, since 3×31130020322³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 31130020322.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19015688 + ... + 19017324.

Almost surely, 2^31130020322 is an apocalyptic number.

31130020322 is a deficient number, since it is larger than the sum of its proper divisors (20397869182).

31130020322 is a wasteful number, since it uses less digits than its factorization.

31130020322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31130020322 its reverse (22302003113), we get a palindrome (53432023435).

The spelling of 31130020322 in words is "thirty-one billion, one hundred thirty million, twenty thousand, three hundred twenty-two".