22724235 has 12 divisors (see below), whose sum is σ = 39388752. Its totient is φ = 12119568.

The previous prime is 22724231. The next prime is 22724267. The reversal of 22724235 is 53242722.

It is not a de Polignac number, because 22724235 - 2² = 22724231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22724199 and 22724208.

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 11 ways as a sum of consecutive naturals, for example, 252447 + ... + 252536.

It is an arithmetic number, because the mean of its divisors is an integer number (3282396).

Almost surely, 2^22724235 is an apocalyptic number.

22724235 is a deficient number, since it is larger than the sum of its proper divisors (16664517).

22724235 is a wasteful number, since it uses less digits than its factorization.

22724235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504994 (or 504991 counting only the distinct ones).

The product of its digits is 6720, while the sum is 27.

The square root of 22724235 is about 4766.9943360571. The cubic root of 22724235 is about 283.2455468135.

Adding to 22724235 its reverse (53242722), we get a palindrome (75966957).

The spelling of 22724235 in words is "twenty-two million, seven hundred twenty-four thousand, two hundred thirty-five".