22645305 has 64 divisors (see below), whose sum is σ = 42577920. Its totient is φ = 11406528.

The previous prime is 22645291. The next prime is 22645307. The reversal of 22645305 is 50354622.

It is not a de Polignac number, because 22645305 - 2⁹ = 22644793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22645307) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 272794 + ... + 272876.

It is an arithmetic number, because the mean of its divisors is an integer number (665280).

Almost surely, 2^22645305 is an apocalyptic number.

It is an amenable number.

22645305 is a deficient number, since it is larger than the sum of its proper divisors (19932615).

22645305 is a wasteful number, since it uses less digits than its factorization.

22645305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 22645305 is about 4758.7083331509. The cubic root of 22645305 is about 282.9172261844.

Adding to 22645305 its reverse (50354622), we get a palindrome (72999927).

It can be divided in two parts, 2264 and 5305, that added together give a square (7569 = 87²).

The spelling of 22645305 in words is "twenty-two million, six hundred forty-five thousand, three hundred five".