505216669 has 4 divisors (see below), whose sum is σ = 531807040. Its totient is φ = 478626300.

The previous prime is 505216667. The next prime is 505216687. The reversal of 505216669 is 966612505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 505216669 - 2¹ = 505216667 is a prime.

It is a super-2 number, since 2×505216669² = 510487765270911122, 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 (505216667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13295157 + ... + 13295194.

It is an arithmetic number, because the mean of its divisors is an integer number (132951760).

Almost surely, 2^505216669 is an apocalyptic number.

It is an amenable number.

505216669 is a deficient number, since it is larger than the sum of its proper divisors (26590371).

505216669 is a wasteful number, since it uses less digits than its factorization.

505216669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26590370.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 505216669 is about 22477.0253592418. The cubic root of 505216669 is about 796.4512967618.

The spelling of 505216669 in words is "five hundred five million, two hundred sixteen thousand, six hundred sixty-nine".