2191299 has 8 divisors (see below), whose sum is σ = 3187392. Its totient is φ = 1328040.

The previous prime is 2191291. The next prime is 2191331. The reversal of 2191299 is 9921912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2191299 - 2³ = 2191291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 66403 = 2191299 / (2 + 1 + 9 + 1 + 2 + 9 + 9).

2191299 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2191291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33169 + ... + 33234.

It is an arithmetic number, because the mean of its divisors is an integer number (398424).

2^2191299 is an apocalyptic number.

2191299 is a deficient number, since it is larger than the sum of its proper divisors (996093).

2191299 is a wasteful number, since it uses less digits than its factorization.

2191299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66417.

The product of its digits is 2916, while the sum is 33.

The square root of 2191299 is about 1480.3036850593. The cubic root of 2191299 is about 129.8874568383.

The spelling of 2191299 in words is "two million, one hundred ninety-one thousand, two hundred ninety-nine".