505156317 has 4 divisors (see below), whose sum is σ = 673541760. Its totient is φ = 336770876.

The previous prime is 505156283. The next prime is 505156357. The reversal of 505156317 is 713651505.

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 505156317 - 2¹⁰ = 505155293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505156357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84192717 + ... + 84192722.

It is an arithmetic number, because the mean of its divisors is an integer number (168385440).

Almost surely, 2^505156317 is an apocalyptic number.

It is an amenable number.

505156317 is a deficient number, since it is larger than the sum of its proper divisors (168385443).

505156317 is a wasteful number, since it uses less digits than its factorization.

505156317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168385442.

The product of its (nonzero) digits is 15750, while the sum is 33.

The square root of 505156317 is about 22475.6827927429. The cubic root of 505156317 is about 796.4195814300.

The spelling of 505156317 in words is "five hundred five million, one hundred fifty-six thousand, three hundred seventeen".