505133521 has 8 divisors (see below), whose sum is σ = 527492160. Its totient is φ = 482807952.

The previous prime is 505133491. The next prime is 505133537. The reversal of 505133521 is 125331505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505133521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505133591) 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, 26031 + ... + 41083.

It is an arithmetic number, because the mean of its divisors is an integer number (65936520).

Almost surely, 2^505133521 is an apocalyptic number.

It is an amenable number.

505133521 is a deficient number, since it is larger than the sum of its proper divisors (22358639).

505133521 is a wasteful number, since it uses less digits than its factorization.

505133521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16535.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 505133521 is about 22475.1756611600. The cubic root of 505133521 is about 796.4076013404.

The spelling of 505133521 in words is "five hundred five million, one hundred thirty-three thousand, five hundred twenty-one".