22813309 has 4 divisors (see below), whose sum is σ = 23805216. Its totient is φ = 21821404.

The previous prime is 22813279. The next prime is 22813313. The reversal of 22813309 is 90331822.

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 22813309 - 2⁵ = 22813277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22813339) 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, 495919 + ... + 495964.

It is an arithmetic number, because the mean of its divisors is an integer number (5951304).

Almost surely, 2^22813309 is an apocalyptic number.

It is an amenable number.

22813309 is a deficient number, since it is larger than the sum of its proper divisors (991907).

22813309 is an equidigital number, since it uses as much as digits as its factorization.

22813309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991906.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 22813309 is about 4776.3279828755. The cubic root of 22813309 is about 283.6151510463.

The spelling of 22813309 in words is "twenty-two million, eight hundred thirteen thousand, three hundred nine".