506255509 has 2 divisors, whose sum is σ = 506255510. Its totient is φ = 506255508.

The previous prime is 506255467. The next prime is 506255521. The reversal of 506255509 is 905552605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 473193009 + 33062500 = 21753^2 + 5750^2 .

It is a cyclic number.

It is not a de Polignac number, because 506255509 - 2⁹ = 506254997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506255539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253127754 + 253127755.

It is an arithmetic number, because the mean of its divisors is an integer number (253127755).

Almost surely, 2^506255509 is an apocalyptic number.

It is an amenable number.

506255509 is a deficient number, since it is larger than the sum of its proper divisors (1).

506255509 is an equidigital number, since it uses as much as digits as its factorization.

506255509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67500, while the sum is 37.

The square root of 506255509 is about 22500.1224218892. The cubic root of 506255509 is about 796.9968178325.

The spelling of 506255509 in words is "five hundred six million, two hundred fifty-five thousand, five hundred nine".