22648221 has 16 divisors (see below), whose sum is σ = 33633600. Its totient is φ = 15062544.

The previous prime is 22648201. The next prime is 22648237. The reversal of 22648221 is 12284622.

It is a happy number.

It is not a de Polignac number, because 22648221 - 2⁵ = 22648189 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22648201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15135 + ... + 16563.

It is an arithmetic number, because the mean of its divisors is an integer number (2102100).

Almost surely, 2^22648221 is an apocalyptic number.

It is an amenable number.

22648221 is a deficient number, since it is larger than the sum of its proper divisors (10985379).

22648221 is a wasteful number, since it uses less digits than its factorization.

22648221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025 (or 2019 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 22648221 is about 4759.0147089497. The cubic root of 22648221 is about 282.9293692640.

The spelling of 22648221 in words is "twenty-two million, six hundred forty-eight thousand, two hundred twenty-one".