22206913 has 4 divisors (see below), whose sum is σ = 23513220. Its totient is φ = 20900608.

The previous prime is 22206911. The next prime is 22206917. The reversal of 22206913 is 31960222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17040384 + 5166529 = 4128^2 + 2273^2 .

It is a cyclic number.

It is not a de Polignac number, because 22206913 - 2¹ = 22206911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22206911) 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, 653128 + ... + 653161.

It is an arithmetic number, because the mean of its divisors is an integer number (5878305).

Almost surely, 2^22206913 is an apocalyptic number.

It is an amenable number.

22206913 is a deficient number, since it is larger than the sum of its proper divisors (1306307).

22206913 is a wasteful number, since it uses less digits than its factorization.

22206913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306306.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 22206913 is about 4712.4211399237. The cubic root of 22206913 is about 281.0796454453.

The spelling of 22206913 in words is "twenty-two million, two hundred six thousand, nine hundred thirteen".