22228709 has 2 divisors, whose sum is σ = 22228710. Its totient is φ = 22228708.

The previous prime is 22228693. The next prime is 22228747. The reversal of 22228709 is 90782222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16240900 + 5987809 = 4030^2 + 2447^2 .

It is a cyclic number.

It is not a de Polignac number, because 22228709 - 2⁴ = 22228693 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11114354 + 11114355.

It is an arithmetic number, because the mean of its divisors is an integer number (11114355).

Almost surely, 2^22228709 is an apocalyptic number.

It is an amenable number.

22228709 is a deficient number, since it is larger than the sum of its proper divisors (1).

22228709 is an equidigital number, since it uses as much as digits as its factorization.

22228709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 22228709 is about 4714.7331843912. The cubic root of 22228709 is about 281.1715749073.

The spelling of 22228709 in words is "twenty-two million, two hundred twenty-eight thousand, seven hundred nine".