22611623 has 4 divisors (see below), whose sum is σ = 23163168. Its totient is φ = 22060080.

The previous prime is 22611613. The next prime is 22611637. The reversal of 22611623 is 32611622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32611622 = 2 ⋅16305811.

It is a cyclic number.

It is not a de Polignac number, because 22611623 - 2¹² = 22607527 is a prime.

It is a super-2 number, since 2×22611623² = 1022570989388258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22611613) 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, 275711 + ... + 275792.

It is an arithmetic number, because the mean of its divisors is an integer number (5790792).

Almost surely, 2^22611623 is an apocalyptic number.

22611623 is a deficient number, since it is larger than the sum of its proper divisors (551545).

22611623 is an equidigital number, since it uses as much as digits as its factorization.

22611623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551544.

The product of its digits is 864, while the sum is 23.

The square root of 22611623 is about 4755.1680306799. The cubic root of 22611623 is about 282.7768888323.

Subtracting 22611623 from its reverse (32611622), we obtain a palindrome (9999999).

The spelling of 22611623 in words is "twenty-two million, six hundred eleven thousand, six hundred twenty-three".