226191 has 8 divisors (see below), whose sum is σ = 344704. Its totient is φ = 129240.

The previous prime is 226189. The next prime is 226199. The reversal of 226191 is 191622.

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

It is not a de Polignac number, because 226191 - 2¹ = 226189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10771 = 226191 / (2 + 2 + 6 + 1 + 9 + 1).

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226199) 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, 5365 + ... + 5406.

It is an arithmetic number, because the mean of its divisors is an integer number (43088).

2²²⁶¹⁹¹ is an apocalyptic number.

226191 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

226191 is a deficient number, since it is larger than the sum of its proper divisors (118513).

226191 is a wasteful number, since it uses less digits than its factorization.

226191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10781.

The product of its digits is 216, while the sum is 21.

The square root of 226191 is about 475.5954162941. The cubic root of 226191 is about 60.9291482308.

The spelling of 226191 in words is "two hundred twenty-six thousand, one hundred ninety-one".