216272311 has 4 divisors (see below), whose sum is σ = 216510624. Its totient is φ = 216034000.

The previous prime is 216272281. The next prime is 216272323. The reversal of 216272311 is 113272612.

It is a happy number.

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 216272311 - 2⁷ = 216272183 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 (216272711) 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, 117790 + ... + 119611.

It is an arithmetic number, because the mean of its divisors is an integer number (54127656).

Almost surely, 2^216272311 is an apocalyptic number.

216272311 is a deficient number, since it is larger than the sum of its proper divisors (238313).

216272311 is an equidigital number, since it uses as much as digits as its factorization.

216272311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238312.

The product of its digits is 1008, while the sum is 25.

The square root of 216272311 is about 14706.1997470455. The cubic root of 216272311 is about 600.2520339315.

The spelling of 216272311 in words is "two hundred sixteen million, two hundred seventy-two thousand, three hundred eleven".