2191355 has 4 divisors (see below), whose sum is σ = 2629632. Its totient is φ = 1753080.

The previous prime is 2191339. The next prime is 2191363. The reversal of 2191355 is 5531912.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2191355 - 2⁴ = 2191339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219131 + ... + 219140.

It is an arithmetic number, because the mean of its divisors is an integer number (657408).

2^2191355 is an apocalyptic number.

2191355 is a deficient number, since it is larger than the sum of its proper divisors (438277).

2191355 is an equidigital number, since it uses as much as digits as its factorization.

2191355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438276.

The product of its digits is 1350, while the sum is 26.

The square root of 2191355 is about 1480.3225999761. The cubic root of 2191355 is about 129.8885632802. Note that the first 3 decimals are identical.

The spelling of 2191355 in words is "two million, one hundred ninety-one thousand, three hundred fifty-five".