2191273 has 8 divisors (see below), whose sum is σ = 2540160. Its totient is φ = 1851360.

The previous prime is 2191261. The next prime is 2191291. The reversal of 2191273 is 3721912.

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

It is not a de Polignac number, because 2191273 - 2²¹ = 94121 is a prime.

2191273 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2191243) 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, 1708 + ... + 2701.

It is an arithmetic number, because the mean of its divisors is an integer number (317520).

2^2191273 is an apocalyptic number.

It is an amenable number.

2191273 is a deficient number, since it is larger than the sum of its proper divisors (348887).

2191273 is an equidigital number, since it uses as much as digits as its factorization.

2191273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487.

The product of its digits is 756, while the sum is 25.

The square root of 2191273 is about 1480.2949030514. The cubic root of 2191273 is about 129.8869431266.

The spelling of 2191273 in words is "two million, one hundred ninety-one thousand, two hundred seventy-three".