22305645 has 32 divisors (see below), whose sum is σ = 39997440. Its totient is φ = 11793600.

The previous prime is 22305643. The next prime is 22305659. The reversal of 22305645 is 54650322.

It is not a de Polignac number, because 22305645 - 2¹ = 22305643 is a prime.

It is a super-3 number, since 3×22305645³ (a number of 23 digits) contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22305641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16495 + ... + 17795.

It is an arithmetic number, because the mean of its divisors is an integer number (1249920).

Almost surely, 2^22305645 is an apocalyptic number.

It is an amenable number.

22305645 is a deficient number, since it is larger than the sum of its proper divisors (17691795).

22305645 is a wasteful number, since it uses less digits than its factorization.

22305645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442 (or 1436 counting only the distinct ones).

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

The square root of 22305645 is about 4722.8852410365. The cubic root of 22305645 is about 281.4955899308.

Adding to 22305645 its reverse (54650322), we get a palindrome (76955967).

It can be divided in two parts, 2230 and 5645, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 22305645 in words is "twenty-two million, three hundred five thousand, six hundred forty-five".