22002509 has 2 divisors, whose sum is σ = 22002510. Its totient is φ = 22002508.

The previous prime is 22002443. The next prime is 22002511. The reversal of 22002509 is 90520022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15642025 + 6360484 = 3955^2 + 2522^2 .

It is a cyclic number.

It is not a de Polignac number, because 22002509 - 2¹⁶ = 21936973 is a prime.

It is a super-2 number, since 2×22002509² = 968220804590162, which contains 22 as substring.

Together with 22002511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22002809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11001254 + 11001255.

It is an arithmetic number, because the mean of its divisors is an integer number (11001255).

Almost surely, 2^22002509 is an apocalyptic number.

It is an amenable number.

22002509 is a deficient number, since it is larger than the sum of its proper divisors (1).

22002509 is an equidigital number, since it uses as much as digits as its factorization.

22002509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 22002509 is about 4690.6832124969. The cubic root of 22002509 is about 280.2145846556.

The spelling of 22002509 in words is "twenty-two million, two thousand, five hundred nine".