505211887 has 2 divisors, whose sum is σ = 505211888. Its totient is φ = 505211886.

The previous prime is 505211879. The next prime is 505211897. The reversal of 505211887 is 788112505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505211887 - 2³ = 505211879 is a prime.

It is a super-2 number, since 2×505211887² = 510478101532201538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505211827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252605943 + 252605944.

It is an arithmetic number, because the mean of its divisors is an integer number (252605944).

Almost surely, 2^505211887 is an apocalyptic number.

505211887 is a deficient number, since it is larger than the sum of its proper divisors (1).

505211887 is an equidigital number, since it uses as much as digits as its factorization.

505211887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22400, while the sum is 37.

The square root of 505211887 is about 22476.9189837042. The cubic root of 505211887 is about 796.4487838847.

The spelling of 505211887 in words is "five hundred five million, two hundred eleven thousand, eight hundred eighty-seven".