22278573 has 6 divisors (see below), whose sum is σ = 32180174. Its totient is φ = 14852376.

The previous prime is 22278563. The next prime is 22278587. The reversal of 22278573 is 37587222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11269449 + 11009124 = 3357^2 + 3318^2 .

It is not a de Polignac number, because 22278573 - 2¹⁷ = 22147501 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 (22278563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1237690 + ... + 1237707.

Almost surely, 2^22278573 is an apocalyptic number.

It is an amenable number.

22278573 is a deficient number, since it is larger than the sum of its proper divisors (9901601).

22278573 is a wasteful number, since it uses less digits than its factorization.

22278573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2475403 (or 2475400 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 22278573 is about 4720.0183262356. The cubic root of 22278573 is about 281.3816616149.

The spelling of 22278573 in words is "twenty-two million, two hundred seventy-eight thousand, five hundred seventy-three".