22505943 has 16 divisors (see below), whose sum is σ = 32870880. Its totient is φ = 13633536.

The previous prime is 22505941. The next prime is 22505947. The reversal of 22505943 is 34950522.

It is not a de Polignac number, because 22505943 - 2¹ = 22505941 is a prime.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 22505943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22505941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6130 + ... + 9087.

It is an arithmetic number, because the mean of its divisors is an integer number (2054430).

Almost surely, 2^22505943 is an apocalyptic number.

22505943 is a deficient number, since it is larger than the sum of its proper divisors (10364937).

22505943 is a wasteful number, since it uses less digits than its factorization.

22505943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15266.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 22505943 is about 4744.0428960961. The cubic root of 22505943 is about 282.3356623745.

The spelling of 22505943 in words is "twenty-two million, five hundred five thousand, nine hundred forty-three".