31213443104 has 12 divisors (see below), whose sum is σ = 61451466174. Its totient is φ = 15606721536.

The previous prime is 31213443103. The next prime is 31213443109. The reversal of 31213443104 is 40134431213.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26445264400 + 4768178704 = 162620^2 + 69052^2 .

It is not an unprimeable number, because it can be changed into a prime (31213443101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487710017 + ... + 487710080.

Almost surely, 2^31213443104 is an apocalyptic number.

It is an amenable number.

31213443104 is a deficient number, since it is larger than the sum of its proper divisors (30238023070).

31213443104 is an equidigital number, since it uses as much as digits as its factorization.

31213443104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975420107 (or 975420099 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 31213443104 its reverse (40134431213), we get a palindrome (71347874317).

The spelling of 31213443104 in words is "thirty-one billion, two hundred thirteen million, four hundred forty-three thousand, one hundred four".