216733271 has 4 divisors (see below), whose sum is σ = 220822632. Its totient is φ = 212643912.

The previous prime is 216733267. The next prime is 216733273. The reversal of 216733271 is 172337612.

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 216733271 - 2² = 216733267 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 (216733273) 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, 2044601 + ... + 2044706.

It is an arithmetic number, because the mean of its divisors is an integer number (55205658).

Almost surely, 2^216733271 is an apocalyptic number.

216733271 is a deficient number, since it is larger than the sum of its proper divisors (4089361).

216733271 is an equidigital number, since it uses as much as digits as its factorization.

216733271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089360.

The product of its digits is 10584, while the sum is 32.

The square root of 216733271 is about 14721.8637067458. The cubic root of 216733271 is about 600.6781877764.

The spelling of 216733271 in words is "two hundred sixteen million, seven hundred thirty-three thousand, two hundred seventy-one".