222591 has 4 divisors (see below), whose sum is σ = 296792. Its totient is φ = 148392.

The previous prime is 222587. The next prime is 222601. The reversal of 222591 is 195222.

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

It is not a de Polignac number, because 222591 - 2² = 222587 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 222591.

It is not an unprimeable number, because it can be changed into a prime (222511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37096 + ... + 37101.

It is an arithmetic number, because the mean of its divisors is an integer number (74198).

2²²²⁵⁹¹ is an apocalyptic number.

222591 is a deficient number, since it is larger than the sum of its proper divisors (74201).

222591 is an equidigital number, since it uses as much as digits as its factorization.

222591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74200.

The product of its digits is 360, while the sum is 21.

The square root of 222591 is about 471.7955065492. The cubic root of 222591 is about 60.6041735953.

The spelling of 222591 in words is "two hundred twenty-two thousand, five hundred ninety-one".