22779573 has 4 divisors (see below), whose sum is σ = 30372768. Its totient is φ = 15186380.

The previous prime is 22779563. The next prime is 22779611. The reversal of 22779573 is 37597722.

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 22779573 - 2⁹ = 22779061 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22779553) 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, 3796593 + ... + 3796598.

It is an arithmetic number, because the mean of its divisors is an integer number (7593192).

Almost surely, 2^22779573 is an apocalyptic number.

It is an amenable number.

22779573 is a deficient number, since it is larger than the sum of its proper divisors (7593195).

22779573 is an equidigital number, since it uses as much as digits as its factorization.

22779573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7593194.

The product of its digits is 185220, while the sum is 42.

The square root of 22779573 is about 4772.7950930246. The cubic root of 22779573 is about 283.4752800471.

It can be divided in two parts, 227 and 79573, that added together give a triangular number (79800 = T₃₉₉).

The spelling of 22779573 in words is "twenty-two million, seven hundred seventy-nine thousand, five hundred seventy-three".