2161199 has 2 divisors, whose sum is σ = 2161200. Its totient is φ = 2161198.

The previous prime is 2161189. The next prime is 2161213. The reversal of 2161199 is 9911612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2161199 - 2²⁰ = 1112623 is a prime.

It is a super-2 number, since 2×2161199² = 9341562235202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080599 + 1080600.

It is an arithmetic number, because the mean of its divisors is an integer number (1080600).

2^2161199 is an apocalyptic number.

2161199 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161199 is an equidigital number, since it uses as much as digits as its factorization.

2161199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 29.

The square root of 2161199 is about 1470.1016971625. The cubic root of 2161199 is about 129.2899951924.

The spelling of 2161199 in words is "two million, one hundred sixty-one thousand, one hundred ninety-nine".