221440201 has 8 divisors (see below), whose sum is σ = 233399880. Its totient is φ = 209768832.

The previous prime is 221440189. The next prime is 221440207. The reversal of 221440201 is 102044122.

221440201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 84198976 + 137241225 = 9176^2 + 11715^2 .

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

It is not a de Polignac number, because 221440201 - 2⁵ = 221440169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221440207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70500 + ... + 73573.

It is an arithmetic number, because the mean of its divisors is an integer number (29174985).

Almost surely, 2^221440201 is an apocalyptic number.

It is an amenable number.

221440201 is a deficient number, since it is larger than the sum of its proper divisors (11959679).

221440201 is a wasteful number, since it uses less digits than its factorization.

221440201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144155.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 221440201 is about 14880.8669438309. The cubic root of 221440201 is about 604.9955157558.

Adding to 221440201 its reverse (102044122), we get a palindrome (323484323).

The spelling of 221440201 in words is "two hundred twenty-one million, four hundred forty thousand, two hundred one".