22724291 has 8 divisors (see below), whose sum is σ = 24648624. Its totient is φ = 20865280.

The previous prime is 22724267. The next prime is 22724311. The reversal of 22724291 is 19242722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22724291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22724231) 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, 15605 + ... + 16998.

It is an arithmetic number, because the mean of its divisors is an integer number (3081078).

Almost surely, 2^22724291 is an apocalyptic number.

22724291 is a deficient number, since it is larger than the sum of its proper divisors (1924333).

22724291 is a wasteful number, since it uses less digits than its factorization.

22724291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32661.

The product of its digits is 4032, while the sum is 29.

The square root of 22724291 is about 4767.0002097755. Note that the first 3 decimals coincide. The cubic root of 22724291 is about 283.2457794834.

The spelling of 22724291 in words is "twenty-two million, seven hundred twenty-four thousand, two hundred ninety-one".