22163509 has 2 divisors, whose sum is σ = 22163510. Its totient is φ = 22163508.

The previous prime is 22163507. The next prime is 22163521. The reversal of 22163509 is 90536122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19847025 + 2316484 = 4455^2 + 1522^2 .

It is a cyclic number.

It is not a de Polignac number, because 22163509 - 2¹ = 22163507 is a prime.

It is a super-2 number, since 2×22163509² = 982442262386162, which contains 22 as substring.

Together with 22163507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22163501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11081754 + 11081755.

It is an arithmetic number, because the mean of its divisors is an integer number (11081755).

Almost surely, 2^22163509 is an apocalyptic number.

It is an amenable number.

22163509 is a deficient number, since it is larger than the sum of its proper divisors (1).

22163509 is an equidigital number, since it uses as much as digits as its factorization.

22163509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 22163509 is about 4707.8136114337. The cubic root of 22163509 is about 280.8964001353.

The spelling of 22163509 in words is "twenty-two million, one hundred sixty-three thousand, five hundred nine".