31220104 has 16 divisors (see below), whose sum is σ = 58784220. Its totient is φ = 15544320.

The previous prime is 31220093. The next prime is 31220159. The reversal of 31220104 is 40102213.

It can be written as a sum of positive squares in 2 ways, for example, as 25020004 + 6200100 = 5002^2 + 2490^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6169 + ... + 10024.

Almost surely, 2^31220104 is an apocalyptic number.

It is an amenable number.

31220104 is a deficient number, since it is larger than the sum of its proper divisors (27564116).

31220104 is a wasteful number, since it uses less digits than its factorization.

31220104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16440 (or 16436 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 31220104 is about 5587.4953243828. The cubic root of 31220104 is about 314.8797861601.

Adding to 31220104 its reverse (40102213), we get a palindrome (71322317).

The spelling of 31220104 in words is "thirty-one million, two hundred twenty thousand, one hundred four".