2116611 has 20 divisors (see below), whose sum is σ = 3614512. Its totient is φ = 1209168.

The previous prime is 2116607. The next prime is 2116627. The reversal of 2116611 is 1166112.

2116611 is a `hidden beast` number, since 2 + 1 + 1 + 661 + 1 = 666.

It is not a de Polignac number, because 2116611 - 2² = 2116607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2116601) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1300 + ... + 2433.

2^2116611 is an apocalyptic number.

2116611 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2116611 is a deficient number, since it is larger than the sum of its proper divisors (1497901).

2116611 is an equidigital number, since it uses as much as digits as its factorization.

2116611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3752 (or 3743 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 2116611 is about 1454.8577250027. The cubic root of 2116611 is about 128.3946761702.

The spelling of 2116611 in words is "two million, one hundred sixteen thousand, six hundred eleven".