13822191 has 8 divisors (see below), whose sum is σ = 20477360. Its totient is φ = 9214776.

The previous prime is 13822157. The next prime is 13822217. The reversal of 13822191 is 19122831.

It is not a de Polignac number, because 13822191 - 2¹⁰ = 13821167 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 511933 = 13822191 / (1 + 3 + 8 + 2 + 2 + 1 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13812191) 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, 255940 + ... + 255993.

It is an arithmetic number, because the mean of its divisors is an integer number (2559670).

Almost surely, 2^13822191 is an apocalyptic number.

13822191 is a deficient number, since it is larger than the sum of its proper divisors (6655169).

13822191 is an equidigital number, since it uses as much as digits as its factorization.

13822191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511942 (or 511936 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 13822191 is about 3717.8207326336. The cubic root of 13822191 is about 239.9895307933.

The spelling of 13822191 in words is "thirteen million, eight hundred twenty-two thousand, one hundred ninety-one".