22616621 has 4 divisors (see below), whose sum is σ = 22629852. Its totient is φ = 22603392.

The previous prime is 22616603. The next prime is 22616623. The reversal of 22616621 is 12661622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9030025 + 13586596 = 3005^2 + 3686^2 .

It is a cyclic number.

It is not a de Polignac number, because 22616621 - 2¹⁸ = 22354477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22616623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3590 + ... + 7623.

It is an arithmetic number, because the mean of its divisors is an integer number (5657463).

Almost surely, 2^22616621 is an apocalyptic number.

It is an amenable number.

22616621 is a deficient number, since it is larger than the sum of its proper divisors (13231).

22616621 is a wasteful number, since it uses less digits than its factorization.

22616621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13230.

The product of its digits is 1728, while the sum is 26.

The square root of 22616621 is about 4755.6935351219. The cubic root of 22616621 is about 282.7977219937.

The spelling of 22616621 in words is "twenty-two million, six hundred sixteen thousand, six hundred twenty-one".