22132645 has 4 divisors (see below), whose sum is σ = 26559180. Its totient is φ = 17706112.

The previous prime is 22132639. The next prime is 22132679. The reversal of 22132645 is 54623122.

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 9728161 + 12404484 = 3119^2 + 3522^2 .

It is a cyclic number.

It is not a de Polignac number, because 22132645 - 2³ = 22132637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2213260 + ... + 2213269.

It is an arithmetic number, because the mean of its divisors is an integer number (6639795).

Almost surely, 2^22132645 is an apocalyptic number.

It is an amenable number.

22132645 is a deficient number, since it is larger than the sum of its proper divisors (4426535).

22132645 is an equidigital number, since it uses as much as digits as its factorization.

22132645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4426534.

The product of its digits is 2880, while the sum is 25.

The square root of 22132645 is about 4704.5345146996. The cubic root of 22132645 is about 280.7659512683.

Adding to 22132645 its reverse (54623122), we get a palindrome (76755767).

The spelling of 22132645 in words is "twenty-two million, one hundred thirty-two thousand, six hundred forty-five".