22724159 has 4 divisors (see below), whose sum is σ = 22756920. Its totient is φ = 22691400.

The previous prime is 22724129. The next prime is 22724173. The reversal of 22724159 is 95142722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95142722 = 2 ⋅47571361.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22724159 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 (22724129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15317 + ... + 16734.

It is an arithmetic number, because the mean of its divisors is an integer number (5689230).

Almost surely, 2^22724159 is an apocalyptic number.

22724159 is a deficient number, since it is larger than the sum of its proper divisors (32761).

22724159 is an equidigital number, since it uses as much as digits as its factorization.

22724159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32760.

The product of its digits is 10080, while the sum is 32.

The square root of 22724159 is about 4766.9863645704. The cubic root of 22724159 is about 283.2452310466.

The spelling of 22724159 in words is "twenty-two million, seven hundred twenty-four thousand, one hundred fifty-nine".