221422301 has 4 divisors (see below), whose sum is σ = 221991900. Its totient is φ = 220852704.

The previous prime is 221422291. The next prime is 221422307. The reversal of 221422301 is 103224122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 103224122 = 2 ⋅51612061.

It can be written as a sum of positive squares in 2 ways, for example, as 123432100 + 97990201 = 11110^2 + 9899^2 .

It is a cyclic number.

It is not a de Polignac number, because 221422301 - 2⁶ = 221422237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221422301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284216 + ... + 284993.

It is an arithmetic number, because the mean of its divisors is an integer number (55497975).

Almost surely, 2^221422301 is an apocalyptic number.

It is an amenable number.

221422301 is a deficient number, since it is larger than the sum of its proper divisors (569599).

221422301 is an equidigital number, since it uses as much as digits as its factorization.

221422301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569598.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 221422301 is about 14880.2654882230. The cubic root of 221422301 is about 604.9792138204.

Adding to 221422301 its reverse (103224122), we get a palindrome (324646423).

The spelling of 221422301 in words is "two hundred twenty-one million, four hundred twenty-two thousand, three hundred one".