505219999 has 8 divisors (see below), whose sum is σ = 525269808. Its totient is φ = 485538240.

The previous prime is 505219997. The next prime is 505220003. The reversal of 505219999 is 999912505.

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 not a de Polignac number, because 505219999 - 2¹ = 505219997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505219997) 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 in 7 ways as a sum of consecutive naturals, for example, 89212 + ... + 94705.

It is an arithmetic number, because the mean of its divisors is an integer number (65658726).

Almost surely, 2^505219999 is an apocalyptic number.

505219999 is a deficient number, since it is larger than the sum of its proper divisors (20049809).

505219999 is a wasteful number, since it uses less digits than its factorization.

505219999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184025.

The product of its (nonzero) digits is 328050, while the sum is 49.

The square root of 505219999 is about 22477.0994347580. The cubic root of 505219999 is about 796.4530466229.

The spelling of 505219999 in words is "five hundred five million, two hundred nineteen thousand, nine hundred ninety-nine".