22791229 has 4 divisors (see below), whose sum is σ = 23782176. Its totient is φ = 21800284.

The previous prime is 22791227. The next prime is 22791233. The reversal of 22791229 is 92219722.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22791229 - 2¹ = 22791227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22791194 and 22791203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22791221) 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, 495439 + ... + 495484.

It is an arithmetic number, because the mean of its divisors is an integer number (5945544).

Almost surely, 2^22791229 is an apocalyptic number.

It is an amenable number.

22791229 is a deficient number, since it is larger than the sum of its proper divisors (990947).

22791229 is an equidigital number, since it uses as much as digits as its factorization.

22791229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990946.

The product of its digits is 9072, while the sum is 34.

The square root of 22791229 is about 4774.0160242714. The cubic root of 22791229 is about 283.5236219608.

The spelling of 22791229 in words is "twenty-two million, seven hundred ninety-one thousand, two hundred twenty-nine".