505331 has 4 divisors (see below), whose sum is σ = 521664. Its totient is φ = 489000.

The previous prime is 505327. The next prime is 505339. The reversal of 505331 is 133505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133505 = 5 ⋅26701.

It is a cyclic number.

It is not a de Polignac number, because 505331 - 2² = 505327 is a prime.

It is a super-2 number, since 2×505331² = 510718839122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505339) 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, 8120 + ... + 8181.

It is an arithmetic number, because the mean of its divisors is an integer number (130416).

2⁵⁰⁵³³¹ is an apocalyptic number.

505331 is a deficient number, since it is larger than the sum of its proper divisors (16333).

505331 is a wasteful number, since it uses less digits than its factorization.

505331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16332.

The product of its (nonzero) digits is 225, while the sum is 17.

The square root of 505331 is about 710.8663728156. The cubic root of 505331 is about 79.6511371452.

Adding to 505331 its reverse (133505), we get a palindrome (638836).

The spelling of 505331 in words is "five hundred five thousand, three hundred thirty-one".