22167921 has 16 divisors (see below), whose sum is σ = 31102848. Its totient is φ = 14025600.

The previous prime is 22167913. The next prime is 22167931. The reversal of 22167921 is 12976122.

It is not a de Polignac number, because 22167921 - 2³ = 22167913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22167931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2116 + ... + 6986.

It is an arithmetic number, because the mean of its divisors is an integer number (1943928).

Almost surely, 2^22167921 is an apocalyptic number.

It is an amenable number.

22167921 is a deficient number, since it is larger than the sum of its proper divisors (8934927).

22167921 is a wasteful number, since it uses less digits than its factorization.

22167921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4952.

The product of its digits is 3024, while the sum is 30.

The square root of 22167921 is about 4708.2821708135. The cubic root of 22167921 is about 280.9150378683.

The spelling of 22167921 in words is "twenty-two million, one hundred sixty-seven thousand, nine hundred twenty-one".