22672521 has 8 divisors (see below), whose sum is σ = 33588960. Its totient is φ = 15114996.

The previous prime is 22672513. The next prime is 22672547. The reversal of 22672521 is 12527622.

It is not a de Polignac number, because 22672521 - 2³ = 22672513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 839723 = 22672521 / (2 + 2 + 6 + 7 + 2 + 5 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (22672561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419835 + ... + 419888.

It is an arithmetic number, because the mean of its divisors is an integer number (4198620).

Almost surely, 2^22672521 is an apocalyptic number.

It is an amenable number.

22672521 is a deficient number, since it is larger than the sum of its proper divisors (10916439).

22672521 is an equidigital number, since it uses as much as digits as its factorization.

22672521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839732 (or 839726 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 22672521 is about 4761.5670739789. The cubic root of 22672521 is about 283.0305210832.

The spelling of 22672521 in words is "twenty-two million, six hundred seventy-two thousand, five hundred twenty-one".