505218833887 has 2 divisors, whose sum is σ = 505218833888. Its totient is φ = 505218833886.

The previous prime is 505218833881. The next prime is 505218833893. The reversal of 505218833887 is 788338812505.

It is a balanced prime because it is at equal distance from previous prime (505218833881) and next prime (505218833893).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505218833887 is a prime.

It is a super-2 number, since 2×505218833887² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505218833881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252609416943 + 252609416944.

It is an arithmetic number, because the mean of its divisors is an integer number (252609416944).

Almost surely, 2^505218833887 is an apocalyptic number.

505218833887 is a deficient number, since it is larger than the sum of its proper divisors (1).

505218833887 is an equidigital number, since it uses as much as digits as its factorization.

505218833887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12902400, while the sum is 58.

The spelling of 505218833887 in words is "five hundred five billion, two hundred eighteen million, eight hundred thirty-three thousand, eight hundred eighty-seven".