22579721 has 8 divisors (see below), whose sum is σ = 23651520. Its totient is φ = 21515472.

The previous prime is 22579691. The next prime is 22579727. The reversal of 22579721 is 12797522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22579721 - 2¹⁸ = 22317577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22579727) 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, 4775 + ... + 8243.

It is an arithmetic number, because the mean of its divisors is an integer number (2956440).

Almost surely, 2^22579721 is an apocalyptic number.

It is an amenable number.

22579721 is a deficient number, since it is larger than the sum of its proper divisors (1071799).

22579721 is a wasteful number, since it uses less digits than its factorization.

22579721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3775.

The product of its digits is 17640, while the sum is 35.

The square root of 22579721 is about 4751.8123910777. The cubic root of 22579721 is about 282.6438393503.

The spelling of 22579721 in words is "twenty-two million, five hundred seventy-nine thousand, seven hundred twenty-one".