22239817 has 2 divisors, whose sum is σ = 22239818. Its totient is φ = 22239816.

The previous prime is 22239809. The next prime is 22239821. The reversal of 22239817 is 71893222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12931216 + 9308601 = 3596^2 + 3051^2 .

It is a cyclic number.

It is not a de Polignac number, because 22239817 - 2³ = 22239809 is a prime.

It is not a weakly prime, because it can be changed into another prime (22239857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11119908 + 11119909.

It is an arithmetic number, because the mean of its divisors is an integer number (11119909).

Almost surely, 2^22239817 is an apocalyptic number.

It is an amenable number.

22239817 is a deficient number, since it is larger than the sum of its proper divisors (1).

22239817 is an equidigital number, since it uses as much as digits as its factorization.

22239817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 22239817 is about 4715.9110466590. The cubic root of 22239817 is about 281.2184022444.

The spelling of 22239817 in words is "twenty-two million, two hundred thirty-nine thousand, eight hundred seventeen".