505282081 has 4 divisors (see below), whose sum is σ = 505331712. Its totient is φ = 505232452.

The previous prime is 505282069. The next prime is 505282091. The reversal of 505282081 is 180282505.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 505282081 - 2¹⁵ = 505249313 is a prime.

It is a super-2 number, since 2×505282081² = 510619962759381122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505282031) 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 3 ways as a sum of consecutive naturals, for example, 3361 + ... + 31966.

It is an arithmetic number, because the mean of its divisors is an integer number (126332928).

Almost surely, 2^505282081 is an apocalyptic number.

It is an amenable number.

505282081 is a deficient number, since it is larger than the sum of its proper divisors (49631).

505282081 is a wasteful number, since it uses less digits than its factorization.

505282081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49630.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 505282081 is about 22478.4803979273. The cubic root of 505282081 is about 796.4856683012.

The spelling of 505282081 in words is "five hundred five million, two hundred eighty-two thousand, eighty-one".