22659921 has 12 divisors (see below), whose sum is σ = 33529860. Its totient is φ = 14737920.

The previous prime is 22659911. The next prime is 22659979. The reversal of 22659921 is 12995622.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12006225 + 10653696 = 3465^2 + 3264^2 .

It is not a de Polignac number, because 22659921 - 2¹⁰ = 22658897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22659911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30336 + ... + 31073.

It is an arithmetic number, because the mean of its divisors is an integer number (2794155).

Almost surely, 2^22659921 is an apocalyptic number.

It is an amenable number.

22659921 is a deficient number, since it is larger than the sum of its proper divisors (10869939).

22659921 is a wasteful number, since it uses less digits than its factorization.

22659921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61456 (or 61453 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 22659921 is about 4760.2437962777. The cubic root of 22659921 is about 282.9780810187.

The spelling of 22659921 in words is "twenty-two million, six hundred fifty-nine thousand, nine hundred twenty-one".