255602509 has 2 divisors, whose sum is σ = 255602510. Its totient is φ = 255602508.

The previous prime is 255602507. The next prime is 255602537. The reversal of 255602509 is 905206552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251317609 + 4284900 = 15853^2 + 2070^2 .

It is a cyclic number.

It is not a de Polignac number, because 255602509 - 2¹ = 255602507 is a prime.

Together with 255602507, 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 (255602507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127801254 + 127801255.

It is an arithmetic number, because the mean of its divisors is an integer number (127801255).

Almost surely, 2^255602509 is an apocalyptic number.

It is an amenable number.

255602509 is a deficient number, since it is larger than the sum of its proper divisors (1).

255602509 is an equidigital number, since it uses as much as digits as its factorization.

255602509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 255602509 is about 15987.5735807533. The cubic root of 255602509 is about 634.6316163673.

The spelling of 255602509 in words is "two hundred fifty-five million, six hundred two thousand, five hundred nine".