505250815 has 4 divisors (see below), whose sum is σ = 606300984. Its totient is φ = 404200648.

The previous prime is 505250771. The next prime is 505250827. The reversal of 505250815 is 518052505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 518052505 = 5 ⋅103610501.

It is a cyclic number.

It is not a de Polignac number, because 505250815 - 2¹⁷ = 505119743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 50525077 + ... + 50525086.

It is an arithmetic number, because the mean of its divisors is an integer number (151575246).

Almost surely, 2^505250815 is an apocalyptic number.

505250815 is a deficient number, since it is larger than the sum of its proper divisors (101050169).

505250815 is a wasteful number, since it uses less digits than its factorization.

505250815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101050168.

The product of its (nonzero) digits is 10000, while the sum is 31.

The square root of 505250815 is about 22477.7849220069. The cubic root of 505250815 is about 796.4692395673.

The spelling of 505250815 in words is "five hundred five million, two hundred fifty thousand, eight hundred fifteen".