222221023 has 4 divisors (see below), whose sum is σ = 222272008. Its totient is φ = 222170040.

The previous prime is 222220993. The next prime is 222221047. The reversal of 222221023 is 320122222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222221023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222220988 and 222221006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18273 + ... + 27898.

It is an arithmetic number, because the mean of its divisors is an integer number (55568002).

Almost surely, 2^222221023 is an apocalyptic number.

222221023 is a deficient number, since it is larger than the sum of its proper divisors (50985).

222221023 is an equidigital number, since it uses as much as digits as its factorization.

222221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50984.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 222221023 is about 14907.0796268082. The cubic root of 222221023 is about 605.7057747097.

Adding to 222221023 its reverse (320122222), we get a palindrome (542343245).

The spelling of 222221023 in words is "two hundred twenty-two million, two hundred twenty-one thousand, twenty-three".