22816009 has 4 divisors (see below), whose sum is σ = 23301504. Its totient is φ = 22330516.

The previous prime is 22816007. The next prime is 22816019. The reversal of 22816009 is 90061822.

It is a happy number.

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: 90061822 = 2 ⋅45030911.

It is a cyclic number.

It is not a de Polignac number, because 22816009 - 2¹ = 22816007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22816007) 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, 242677 + ... + 242770.

It is an arithmetic number, because the mean of its divisors is an integer number (5825376).

Almost surely, 2^22816009 is an apocalyptic number.

It is an amenable number.

22816009 is a deficient number, since it is larger than the sum of its proper divisors (485495).

22816009 is an equidigital number, since it uses as much as digits as its factorization.

22816009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485494.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 22816009 is about 4776.6106184197. The cubic root of 22816009 is about 283.6263394086.

The spelling of 22816009 in words is "twenty-two million, eight hundred sixteen thousand, nine".