22802509 has 2 divisors, whose sum is σ = 22802510. Its totient is φ = 22802508.

The previous prime is 22802503. The next prime is 22802537. The reversal of 22802509 is 90520822.

It is an a-pointer prime, because the next prime (22802537) can be obtained adding 22802509 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17056900 + 5745609 = 4130^2 + 2397^2 .

It is a cyclic number.

It is not a de Polignac number, because 22802509 - 2⁵ = 22802477 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 (22802503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11401254 + 11401255.

It is an arithmetic number, because the mean of its divisors is an integer number (11401255).

Almost surely, 2^22802509 is an apocalyptic number.

It is an amenable number.

22802509 is a deficient number, since it is larger than the sum of its proper divisors (1).

22802509 is an equidigital number, since it uses as much as digits as its factorization.

22802509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 22802509 is about 4775.1972734119. The cubic root of 22802509 is about 283.5703887672.

The spelling of 22802509 in words is "twenty-two million, eight hundred two thousand, five hundred nine".