505214881 has 2 divisors, whose sum is σ = 505214882. Its totient is φ = 505214880.

The previous prime is 505214873. The next prime is 505214923. The reversal of 505214881 is 188412505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499924881 + 5290000 = 22359^2 + 2300^2 .

It is a cyclic number.

It is not a de Polignac number, because 505214881 - 2³ = 505214873 is a prime.

It is a super-2 number, since 2×505214881² = 510484151967688322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505214851) 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 as a sum of consecutive naturals, namely, 252607440 + 252607441.

It is an arithmetic number, because the mean of its divisors is an integer number (252607441).

Almost surely, 2^505214881 is an apocalyptic number.

It is an amenable number.

505214881 is a deficient number, since it is larger than the sum of its proper divisors (1).

505214881 is an equidigital number, since it uses as much as digits as its factorization.

505214881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12800, while the sum is 34.

The square root of 505214881 is about 22476.9855852603. The cubic root of 505214881 is about 796.4503571936.

The spelling of 505214881 in words is "five hundred five million, two hundred fourteen thousand, eight hundred eighty-one".