22717229 has 2 divisors, whose sum is σ = 22717230. Its totient is φ = 22717228.

The previous prime is 22717207. The next prime is 22717271. The reversal of 22717229 is 92271722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20268004 + 2449225 = 4502^2 + 1565^2 .

It is a cyclic number.

It is not a de Polignac number, because 22717229 - 2⁸ = 22716973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22717195 and 22717204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22767229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11358614 + 11358615.

It is an arithmetic number, because the mean of its divisors is an integer number (11358615).

Almost surely, 2^22717229 is an apocalyptic number.

It is an amenable number.

22717229 is a deficient number, since it is larger than the sum of its proper divisors (1).

22717229 is an equidigital number, since it uses as much as digits as its factorization.

22717229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 32.

The square root of 22717229 is about 4766.2594348189. The cubic root of 22717229 is about 283.2164351291.

The spelling of 22717229 in words is "twenty-two million, seven hundred seventeen thousand, two hundred twenty-nine".