222340421 has 8 divisors (see below), whose sum is σ = 223642104. Its totient is φ = 221042880.

The previous prime is 222340411. The next prime is 222340429. The reversal of 222340421 is 124043222.

It can be written as a sum of positive squares in 4 ways, for example, as 2500 + 222337921 = 50^2 + 14911^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 222340421 - 2¹⁸ = 222078277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222340393 and 222340402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222340429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235811 + ... + 236751.

It is an arithmetic number, because the mean of its divisors is an integer number (27955263).

Almost surely, 2^222340421 is an apocalyptic number.

It is an amenable number.

222340421 is a deficient number, since it is larger than the sum of its proper divisors (1301683).

222340421 is an equidigital number, since it uses as much as digits as its factorization.

222340421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 222340421 is about 14911.0838304933. The cubic root of 222340421 is about 605.8142359594.

Adding to 222340421 its reverse (124043222), we get a palindrome (346383643).

The spelling of 222340421 in words is "two hundred twenty-two million, three hundred forty thousand, four hundred twenty-one".