22772245 has 8 divisors (see below), whose sum is σ = 27842616. Its totient is φ = 17873856.

The previous prime is 22772237. The next prime is 22772251. The reversal of 22772245 is 54227722.

It can be written as a sum of positive squares in 4 ways, for example, as 5349969 + 17422276 = 2313^2 + 4174^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22772245 - 2³ = 22772237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42702 + ... + 43231.

It is an arithmetic number, because the mean of its divisors is an integer number (3480327).

Almost surely, 2^22772245 is an apocalyptic number.

It is an amenable number.

22772245 is a deficient number, since it is larger than the sum of its proper divisors (5070371).

22772245 is an equidigital number, since it uses as much as digits as its factorization.

22772245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85991.

The product of its digits is 15680, while the sum is 31.

The square root of 22772245 is about 4772.0273469459. The cubic root of 22772245 is about 283.4448795703. Note that the first 3 decimals are identical.

Adding to 22772245 its reverse (54227722), we get a palindrome (76999967).

The spelling of 22772245 in words is "twenty-two million, seven hundred seventy-two thousand, two hundred forty-five".