222396891 has 4 divisors (see below), whose sum is σ = 296529192. Its totient is φ = 148264592.

The previous prime is 222396887. The next prime is 222396917. The reversal of 222396891 is 198693222.

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

It is a cyclic number.

It is not a de Polignac number, because 222396891 - 2² = 222396887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222396841) 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, 37066146 + ... + 37066151.

It is an arithmetic number, because the mean of its divisors is an integer number (74132298).

Almost surely, 2^222396891 is an apocalyptic number.

222396891 is a deficient number, since it is larger than the sum of its proper divisors (74132301).

222396891 is an equidigital number, since it uses as much as digits as its factorization.

222396891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74132300.

The product of its digits is 93312, while the sum is 42.

The square root of 222396891 is about 14912.9772681380. The cubic root of 222396891 is about 605.8655198329.

The spelling of 222396891 in words is "two hundred twenty-two million, three hundred ninety-six thousand, eight hundred ninety-one".