22213405 has 4 divisors (see below), whose sum is σ = 26656092. Its totient is φ = 17770720.

The previous prime is 22213403. The next prime is 22213417. The reversal of 22213405 is 50431222.

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 14584761 + 7628644 = 3819^2 + 2762^2 .

It is not a de Polignac number, because 22213405 - 2¹ = 22213403 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 (22213403) 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, 2221336 + ... + 2221345.

It is an arithmetic number, because the mean of its divisors is an integer number (6664023).

Almost surely, 2^22213405 is an apocalyptic number.

It is an amenable number.

22213405 is a deficient number, since it is larger than the sum of its proper divisors (4442687).

22213405 is an equidigital number, since it uses as much as digits as its factorization.

22213405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4442686.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 22213405 is about 4713.1099074815. The cubic root of 22213405 is about 281.1070331821.

Adding to 22213405 its reverse (50431222), we get a palindrome (72644627).

The spelling of 22213405 in words is "twenty-two million, two hundred thirteen thousand, four hundred five".