505656215 has 16 divisors (see below), whose sum is σ = 643768320. Its totient is φ = 380207520.

The previous prime is 505656191. The next prime is 505656223. The reversal of 505656215 is 512656505.

It is not a de Polignac number, because 505656215 - 2²² = 501461911 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8891 + ... + 33020.

It is an arithmetic number, because the mean of its divisors is an integer number (40235520).

Almost surely, 2^505656215 is an apocalyptic number.

505656215 is a deficient number, since it is larger than the sum of its proper divisors (138112105).

505656215 is a wasteful number, since it uses less digits than its factorization.

505656215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42062.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 505656215 is about 22486.8009063095. The cubic root of 505656215 is about 796.6822046264.

The spelling of 505656215 in words is "five hundred five million, six hundred fifty-six thousand, two hundred fifteen".