22721259 has 24 divisors (see below), whose sum is σ = 33956496. Its totient is φ = 13499200.

The previous prime is 22721227. The next prime is 22721261. The reversal of 22721259 is 95212722.

It is not a de Polignac number, because 22721259 - 2⁵ = 22721227 is a prime.

It is a super-2 number, since 2×22721259² = 1032511221090162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22725259) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18649 + ... + 19829.

It is an arithmetic number, because the mean of its divisors is an integer number (1414854).

Almost surely, 2^22721259 is an apocalyptic number.

22721259 is a deficient number, since it is larger than the sum of its proper divisors (11235237).

22721259 is a wasteful number, since it uses less digits than its factorization.

22721259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259 (or 1248 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 22721259 is about 4766.6821794619. The cubic root of 22721259 is about 283.2331815194.

The spelling of 22721259 in words is "twenty-two million, seven hundred twenty-one thousand, two hundred fifty-nine".