22932721 has 4 divisors (see below), whose sum is σ = 26208832. Its totient is φ = 19656612.

The previous prime is 22932713. The next prime is 22932751. The reversal of 22932721 is 12723922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22932721 - 2³ = 22932713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22932721.

It is not an unprimeable number, because it can be changed into a prime (22932751) 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, 1638045 + ... + 1638058.

It is an arithmetic number, because the mean of its divisors is an integer number (6552208).

Almost surely, 2^22932721 is an apocalyptic number.

It is an amenable number.

22932721 is a deficient number, since it is larger than the sum of its proper divisors (3276111).

22932721 is an equidigital number, since it uses as much as digits as its factorization.

22932721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276110.

The product of its digits is 3024, while the sum is 28.

The square root of 22932721 is about 4788.8120656380. The cubic root of 22932721 is about 284.1091336509.

It can be divided in two parts, 22932 and 721, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 22932721 in words is "twenty-two million, nine hundred thirty-two thousand, seven hundred twenty-one".