216348085 has 4 divisors (see below), whose sum is σ = 259617708. Its totient is φ = 173078464.

The previous prime is 216348073. The next prime is 216348089. The reversal of 216348085 is 580843612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64738116 + 151609969 = 8046^2 + 12313^2 .

It is a cyclic number.

It is not a de Polignac number, because 216348085 - 2¹⁷ = 216217013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216348089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21634804 + ... + 21634813.

It is an arithmetic number, because the mean of its divisors is an integer number (64904427).

Almost surely, 2^216348085 is an apocalyptic number.

It is an amenable number.

216348085 is a deficient number, since it is larger than the sum of its proper divisors (43269623).

216348085 is an equidigital number, since it uses as much as digits as its factorization.

216348085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43269622.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 216348085 is about 14708.7757818249. The cubic root of 216348085 is about 600.3221279509.

The spelling of 216348085 in words is "two hundred sixteen million, three hundred forty-eight thousand, eighty-five".