31220242316 has 12 divisors (see below), whose sum is σ = 54697728288. Its totient is φ = 15592319952.

The previous prime is 31220242309. The next prime is 31220242337. The reversal of 31220242316 is 61324202213.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4446356 + ... + 4453371.

It is an arithmetic number, because the mean of its divisors is an integer number (4558144024).

Almost surely, 2^31220242316 is an apocalyptic number.

It is an amenable number.

31220242316 is a deficient number, since it is larger than the sum of its proper divisors (23477485972).

31220242316 is a wasteful number, since it uses less digits than its factorization.

31220242316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8900608 (or 8900606 counting only the distinct ones).

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

Adding to 31220242316 its reverse (61324202213), we get a palindrome (92544444529).

The spelling of 31220242316 in words is "thirty-one billion, two hundred twenty million, two hundred forty-two thousand, three hundred sixteen".