215488571 has 2 divisors, whose sum is σ = 215488572. Its totient is φ = 215488570.

The previous prime is 215488517. The next prime is 215488577. The reversal of 215488571 is 175884512.

Together with previous prime (215488517) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215488571 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (215488577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107744285 + 107744286.

It is an arithmetic number, because the mean of its divisors is an integer number (107744286).

Almost surely, 2^215488571 is an apocalyptic number.

215488571 is a deficient number, since it is larger than the sum of its proper divisors (1).

215488571 is an equidigital number, since it uses as much as digits as its factorization.

215488571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 89600, while the sum is 41.

The square root of 215488571 is about 14679.5289774570. The cubic root of 215488571 is about 599.5260803952.

The spelling of 215488571 in words is "two hundred fifteen million, four hundred eighty-eight thousand, five hundred seventy-one".