216158959 has 4 divisors (see below), whose sum is σ = 216211680. Its totient is φ = 216106240.

The previous prime is 216158933. The next prime is 216158977. The reversal of 216158959 is 959851612.

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

It is a cyclic number.

It is not a de Polignac number, because 216158959 - 2¹⁵ = 216126191 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 (216158989) 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, 19639 + ... + 28600.

It is an arithmetic number, because the mean of its divisors is an integer number (54052920).

Almost surely, 2^216158959 is an apocalyptic number.

216158959 is a deficient number, since it is larger than the sum of its proper divisors (52721).

216158959 is an equidigital number, since it uses as much as digits as its factorization.

216158959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52720.

The product of its digits is 194400, while the sum is 46.

The square root of 216158959 is about 14702.3453571190. The cubic root of 216158959 is about 600.1471481687.

The spelling of 216158959 in words is "two hundred sixteen million, one hundred fifty-eight thousand, nine hundred fifty-nine".