22724365 has 4 divisors (see below), whose sum is σ = 27269244. Its totient is φ = 18179488.

The previous prime is 22724363. The next prime is 22724417. The reversal of 22724365 is 56342722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56342722 = 2 ⋅28171361.

It can be written as a sum of positive squares in 2 ways, for example, as 4932841 + 17791524 = 2221^2 + 4218^2 .

It is a cyclic number.

It is not a de Polignac number, because 22724365 - 2¹ = 22724363 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 (22724363) 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, 2272432 + ... + 2272441.

It is an arithmetic number, because the mean of its divisors is an integer number (6817311).

Almost surely, 2^22724365 is an apocalyptic number.

It is an amenable number.

22724365 is a deficient number, since it is larger than the sum of its proper divisors (4544879).

22724365 is an equidigital number, since it uses as much as digits as its factorization.

22724365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4544878.

The product of its digits is 20160, while the sum is 31.

The square root of 22724365 is about 4767.0079714639. The cubic root of 22724365 is about 283.2460869395.

The spelling of 22724365 in words is "twenty-two million, seven hundred twenty-four thousand, three hundred sixty-five".