31222668 has 24 divisors (see below), whose sum is σ = 72988272. Its totient is φ = 10388224.

The previous prime is 31222663. The next prime is 31222669. The reversal of 31222668 is 86622213.

It is not an unprimeable number, because it can be changed into a prime (31222663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5296 + ... + 9512.

It is an arithmetic number, because the mean of its divisors is an integer number (3041178).

Almost surely, 2^31222668 is an apocalyptic number.

It is an amenable number.

31222668 is an abundant number, since it is smaller than the sum of its proper divisors (41765604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31222668 is a wasteful number, since it uses less digits than its factorization.

31222668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4841 (or 4839 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 31222668 is about 5587.7247605801. The cubic root of 31222668 is about 314.8884059228. Note that the first 3 decimals are identical.

The spelling of 31222668 in words is "thirty-one million, two hundred twenty-two thousand, six hundred sixty-eight".