22724417 has 2 divisors, whose sum is σ = 22724418. Its totient is φ = 22724416.

The previous prime is 22724363. The next prime is 22724419. The reversal of 22724417 is 71442722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20647936 + 2076481 = 4544^2 + 1441^2 .

It is a cyclic number.

It is not a de Polignac number, because 22724417 - 2¹⁴ = 22708033 is a prime.

Together with 22724419, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22724417.

It is not a weakly prime, because it can be changed into another prime (22724419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11362208 + 11362209.

It is an arithmetic number, because the mean of its divisors is an integer number (11362209).

Almost surely, 2^22724417 is an apocalyptic number.

It is an amenable number.

22724417 is a deficient number, since it is larger than the sum of its proper divisors (1).

22724417 is an equidigital number, since it uses as much as digits as its factorization.

22724417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6272, while the sum is 29.

The square root of 22724417 is about 4767.0134256157. The cubic root of 22724417 is about 283.2463029893.

The spelling of 22724417 in words is "twenty-two million, seven hundred twenty-four thousand, four hundred seventeen".