225282509 has 2 divisors, whose sum is σ = 225282510. Its totient is φ = 225282508.

The previous prime is 225282481. The next prime is 225282511. The reversal of 225282509 is 905282522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181656484 + 43626025 = 13478^2 + 6605^2 .

It is a cyclic number.

It is not a de Polignac number, because 225282509 - 2¹² = 225278413 is a prime.

It is a super-2 number, since 2×225282509² = 101504417722670162, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 225282511, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p_12397481 and since 225282509 and 12397481 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225282559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112641254 + 112641255.

It is an arithmetic number, because the mean of its divisors is an integer number (112641255).

Almost surely, 2^225282509 is an apocalyptic number.

It is an amenable number.

225282509 is a deficient number, since it is larger than the sum of its proper divisors (1).

225282509 is an equidigital number, since it uses as much as digits as its factorization.

225282509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 225282509 is about 15009.4140125456. The cubic root of 225282509 is about 608.4746526168.

The spelling of 225282509 in words is "two hundred twenty-five million, two hundred eighty-two thousand, five hundred nine".