2116311 has 4 divisors (see below), whose sum is σ = 2821752. Its totient is φ = 1410872.

The previous prime is 2116307. The next prime is 2116327. The reversal of 2116311 is 1136112.

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 2116311 - 2² = 2116307 is a prime.

It is an Ulam number.

It is a D-number.

2116311 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116351) 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, 352716 + ... + 352721.

It is an arithmetic number, because the mean of its divisors is an integer number (705438).

2^2116311 is an apocalyptic number.

2116311 is a deficient number, since it is larger than the sum of its proper divisors (705441).

2116311 is an equidigital number, since it uses as much as digits as its factorization.

2116311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705440.

The product of its digits is 36, while the sum is 15.

The square root of 2116311 is about 1454.7546184838. The cubic root of 2116311 is about 128.3886098339.

The spelling of 2116311 in words is "two million, one hundred sixteen thousand, three hundred eleven".