505061221 has 16 divisors (see below), whose sum is σ = 593858304. Its totient is φ = 420585984.

The previous prime is 505061191. The next prime is 505061239. The reversal of 505061221 is 122160505.

It is not a de Polignac number, because 505061221 - 2²³ = 496672613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505061192 and 505061201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505061281) 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 15 ways as a sum of consecutive naturals, for example, 31605 + ... + 44821.

It is an arithmetic number, because the mean of its divisors is an integer number (37116144).

Almost surely, 2^505061221 is an apocalyptic number.

It is an amenable number.

505061221 is a deficient number, since it is larger than the sum of its proper divisors (88797083).

505061221 is a wasteful number, since it uses less digits than its factorization.

505061221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13380.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 505061221 is about 22473.5671623354. The cubic root of 505061221 is about 796.3696027951.

The spelling of 505061221 in words is "five hundred five million, sixty-one thousand, two hundred twenty-one".