22445645 has 4 divisors (see below), whose sum is σ = 26934780. Its totient is φ = 17956512.

The previous prime is 22445641. The next prime is 22445653. The reversal of 22445645 is 54654422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5692996 + 16752649 = 2386^2 + 4093^2 .

It is a cyclic number.

It is not a de Polignac number, because 22445645 - 2² = 22445641 is a prime.

It is a super-3 number, since 3×22445645³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22445641) 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, 2244560 + ... + 2244569.

It is an arithmetic number, because the mean of its divisors is an integer number (6733695).

Almost surely, 2^22445645 is an apocalyptic number.

It is an amenable number.

22445645 is a deficient number, since it is larger than the sum of its proper divisors (4489135).

22445645 is an equidigital number, since it uses as much as digits as its factorization.

22445645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4489134.

The product of its digits is 38400, while the sum is 32.

The square root of 22445645 is about 4737.6835056808. The cubic root of 22445645 is about 282.0832919632.

The spelling of 22445645 in words is "twenty-two million, four hundred forty-five thousand, six hundred forty-five".