22280605 has 4 divisors (see below), whose sum is σ = 26736732. Its totient is φ = 17824480.

The previous prime is 22280569. The next prime is 22280627. The reversal of 22280605 is 50608222.

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 13388281 + 8892324 = 3659^2 + 2982^2 .

It is not a de Polignac number, because 22280605 - 2⁷ = 22280477 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 22280605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2228056 + ... + 2228065.

It is an arithmetic number, because the mean of its divisors is an integer number (6684183).

Almost surely, 2^22280605 is an apocalyptic number.

It is an amenable number.

22280605 is a deficient number, since it is larger than the sum of its proper divisors (4456127).

22280605 is an equidigital number, since it uses as much as digits as its factorization.

22280605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4456126.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 22280605 is about 4720.2335747291. The cubic root of 22280605 is about 281.3902161746.

Adding to 22280605 its reverse (50608222), we get a palindrome (72888827).

The spelling of 22280605 in words is "twenty-two million, two hundred eighty thousand, six hundred five".