505053021 has 16 divisors (see below), whose sum is σ = 766563840. Its totient is φ = 292783920.

The previous prime is 505053013. The next prime is 505053053. The reversal of 505053021 is 120350505.

It is not a de Polignac number, because 505053021 - 2³ = 505053013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505053001) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 331951 + ... + 333468.

It is an arithmetic number, because the mean of its divisors is an integer number (47910240).

Almost surely, 2^505053021 is an apocalyptic number.

It is an amenable number.

505053021 is a deficient number, since it is larger than the sum of its proper divisors (261510819).

505053021 is a wasteful number, since it uses less digits than its factorization.

505053021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665456.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 505053021 is about 22473.3847250475. The cubic root of 505053021 is about 796.3652929109.

The spelling of 505053021 in words is "five hundred five million, fifty-three thousand, twenty-one".