22105623 has 8 divisors (see below), whose sum is σ = 29651328. Its totient is φ = 14648504.

The previous prime is 22105619. The next prime is 22105631. The reversal of 22105623 is 32650122.

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 22105623 - 2² = 22105619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22105623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22105693) 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, 21561 + ... + 22562.

It is an arithmetic number, because the mean of its divisors is an integer number (3706416).

Almost surely, 2^22105623 is an apocalyptic number.

22105623 is a deficient number, since it is larger than the sum of its proper divisors (7545705).

22105623 is a wasteful number, since it uses less digits than its factorization.

22105623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44293.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22105623 is about 4701.6617275172. The cubic root of 22105623 is about 280.6516412787.

Adding to 22105623 its reverse (32650122), we get a palindrome (54755745).

The spelling of 22105623 in words is "twenty-two million, one hundred five thousand, six hundred twenty-three".