22661623 has 4 divisors (see below), whose sum is σ = 23854360. Its totient is φ = 21468888.

The previous prime is 22661603. The next prime is 22661633. The reversal of 22661623 is 32616622.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22661623 - 2⁵ = 22661591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22661591 and 22661600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22661603) 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, 596340 + ... + 596377.

It is an arithmetic number, because the mean of its divisors is an integer number (5963590).

Almost surely, 2^22661623 is an apocalyptic number.

22661623 is a deficient number, since it is larger than the sum of its proper divisors (1192737).

22661623 is a wasteful number, since it uses less digits than its factorization.

22661623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192736.

The product of its digits is 5184, while the sum is 28.

The square root of 22661623 is about 4760.4225652772. The cubic root of 22661623 is about 282.9851657247.

The spelling of 22661623 in words is "twenty-two million, six hundred sixty-one thousand, six hundred twenty-three".