505530509 has 8 divisors (see below), whose sum is σ = 552932352. Its totient is φ = 458369440.

The previous prime is 505530503. The next prime is 505530527. The reversal of 505530509 is 905035505.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505530509 is a prime.

It is a super-2 number, since 2×505530509² = 511122191059598162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505530503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55784 + ... + 64209.

It is an arithmetic number, because the mean of its divisors is an integer number (69116544).

Almost surely, 2^505530509 is an apocalyptic number.

It is an amenable number.

505530509 is a deficient number, since it is larger than the sum of its proper divisors (47401843).

505530509 is a wasteful number, since it uses less digits than its factorization.

505530509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120387.

The product of its (nonzero) digits is 16875, while the sum is 32.

The square root of 505530509 is about 22484.0056262224. The cubic root of 505530509 is about 796.6161808272.

The spelling of 505530509 in words is "five hundred five million, five hundred thirty thousand, five hundred nine".