22721479 has 8 divisors (see below), whose sum is σ = 24879888. Its totient is φ = 20578560.

The previous prime is 22721467. The next prime is 22721483. The reversal of 22721479 is 97412722.

It is a happy number.

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 22721479 - 2¹³ = 22713287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22721579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682 + ... + 6775.

It is an arithmetic number, because the mean of its divisors is an integer number (3109986).

Almost surely, 2^22721479 is an apocalyptic number.

22721479 is a deficient number, since it is larger than the sum of its proper divisors (2158409).

22721479 is a wasteful number, since it uses less digits than its factorization.

22721479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7745.

The product of its digits is 14112, while the sum is 34.

The square root of 22721479 is about 4766.7052562541. The cubic root of 22721479 is about 283.2340956574.

The spelling of 22721479 in words is "twenty-two million, seven hundred twenty-one thousand, four hundred seventy-nine".