22749233 has 4 divisors (see below), whose sum is σ = 24499188. Its totient is φ = 20999280.

The previous prime is 22749203. The next prime is 22749239. The reversal of 22749233 is 33294722.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14615329 + 8133904 = 3823^2 + 2852^2 .

It is a cyclic number.

It is not a de Polignac number, because 22749233 - 2⁶ = 22749169 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 22749233.

It is not an unprimeable number, because it can be changed into a prime (22749239) 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, 874958 + ... + 874983.

It is an arithmetic number, because the mean of its divisors is an integer number (6124797).

Almost surely, 2^22749233 is an apocalyptic number.

It is an amenable number.

22749233 is a deficient number, since it is larger than the sum of its proper divisors (1749955).

22749233 is a wasteful number, since it uses less digits than its factorization.

22749233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749954.

The product of its digits is 18144, while the sum is 32.

The square root of 22749233 is about 4769.6156029601. The cubic root of 22749233 is about 283.3493710261.

The spelling of 22749233 in words is "twenty-two million, seven hundred forty-nine thousand, two hundred thirty-three".