22221608 has 24 divisors (see below), whose sum is σ = 42843150. Its totient is φ = 10805184.

The previous prime is 22221599. The next prime is 22221649. The reversal of 22221608 is 80612222.

It can be written as a sum of positive squares in 3 ways, for example, as 18679684 + 3541924 = 4322^2 + 1882^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9938 + ... + 11966.

Almost surely, 2^22221608 is an apocalyptic number.

It is an amenable number.

22221608 is a deficient number, since it is larger than the sum of its proper divisors (20621542).

22221608 is a wasteful number, since it uses less digits than its factorization.

22221608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109 (or 2068 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 22221608 is about 4713.9800593554. The cubic root of 22221608 is about 281.1416314680.

The spelling of 22221608 in words is "twenty-two million, two hundred twenty-one thousand, six hundred eight".