505866915 has 12 divisors (see below), whose sum is σ = 876836064. Its totient is φ = 269795664.

The previous prime is 505866901. The next prime is 505866937. The reversal of 505866915 is 519668505.

It is a happy number.

505866915 is a `hidden beast` number, since 5 + 0 + 586 + 69 + 1 + 5 = 666.

It is not a de Polignac number, because 505866915 - 2⁷ = 505866787 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 11241487 = 505866915 / (5 + 0 + 5 + 8 + 6 + 6 + 9 + 1 + 5).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5620699 + ... + 5620788.

It is an arithmetic number, because the mean of its divisors is an integer number (73069672).

Almost surely, 2^505866915 is an apocalyptic number.

505866915 is a deficient number, since it is larger than the sum of its proper divisors (370969149).

505866915 is a wasteful number, since it uses less digits than its factorization.

505866915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11241498 (or 11241495 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The square root of 505866915 is about 22491.4853889200. The cubic root of 505866915 is about 796.7928447714.

The spelling of 505866915 in words is "five hundred five million, eight hundred sixty-six thousand, nine hundred fifteen".