22340209 has 4 divisors (see below), whose sum is σ = 22549104. Its totient is φ = 22131316.

The previous prime is 22340161. The next prime is 22340249. The reversal of 22340209 is 90204322.

22340209 = 87² + 88² + ... + 407².

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 22340209 - 2⁹ = 22339697 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 22340209.

It is not an unprimeable number, because it can be changed into a prime (22340249) 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, 104287 + ... + 104500.

It is an arithmetic number, because the mean of its divisors is an integer number (5637276).

Almost surely, 2^22340209 is an apocalyptic number.

It is an amenable number.

22340209 is a deficient number, since it is larger than the sum of its proper divisors (208895).

22340209 is a wasteful number, since it uses less digits than its factorization.

22340209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208894.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 22340209 is about 4726.5430284723. The cubic root of 22340209 is about 281.6409132685.

The spelling of 22340209 in words is "twenty-two million, three hundred forty thousand, two hundred nine".