22452809 has 4 divisors (see below), whose sum is σ = 22614480. Its totient is φ = 22291140.

The previous prime is 22452799. The next prime is 22452847. The reversal of 22452809 is 90825422.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90825422 = 2 ⋅45412711.

It is a cyclic number.

It is not a de Polignac number, because 22452809 - 2⁸ = 22452553 is a prime.

It is a super-3 number, since 3×22452809³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22422809) 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, 80627 + ... + 80904.

It is an arithmetic number, because the mean of its divisors is an integer number (5653620).

Almost surely, 2^22452809 is an apocalyptic number.

It is an amenable number.

22452809 is a deficient number, since it is larger than the sum of its proper divisors (161671).

22452809 is a wasteful number, since it uses less digits than its factorization.

22452809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161670.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 22452809 is about 4738.4395110627. The cubic root of 22452809 is about 282.1132997107.

The spelling of 22452809 in words is "twenty-two million, four hundred fifty-two thousand, eight hundred nine".