505583021 has 2 divisors, whose sum is σ = 505583022. Its totient is φ = 505583020.

The previous prime is 505583011. The next prime is 505583041. The reversal of 505583021 is 120385505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 386554921 + 119028100 = 19661^2 + 10910^2 .

It is a cyclic number.

It is not a de Polignac number, because 505583021 - 2¹⁰ = 505581997 is a prime.

It is a super-2 number, since 2×505583021² = 511228382246972882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505583011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252791510 + 252791511.

It is an arithmetic number, because the mean of its divisors is an integer number (252791511).

Almost surely, 2^505583021 is an apocalyptic number.

It is an amenable number.

505583021 is a deficient number, since it is larger than the sum of its proper divisors (1).

505583021 is an equidigital number, since it uses as much as digits as its factorization.

505583021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 505583021 is about 22485.1733593495. The cubic root of 505583021 is about 796.6437627171.

The spelling of 505583021 in words is "five hundred five million, five hundred eighty-three thousand, twenty-one".