221303113 has 4 divisors (see below), whose sum is σ = 221930388. Its totient is φ = 220675840.

The previous prime is 221303111. The next prime is 221303123. The reversal of 221303113 is 311303122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30780304 + 190522809 = 5548^2 + 13803^2 .

It is a cyclic number.

It is not a de Polignac number, because 221303113 - 2¹ = 221303111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221303111) 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, 313108 + ... + 313813.

It is an arithmetic number, because the mean of its divisors is an integer number (55482597).

Almost surely, 2^221303113 is an apocalyptic number.

It is an amenable number.

221303113 is a deficient number, since it is larger than the sum of its proper divisors (627275).

221303113 is an equidigital number, since it uses as much as digits as its factorization.

221303113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627274.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 221303113 is about 14876.2600474716. The cubic root of 221303113 is about 604.8706442018.

Adding to 221303113 its reverse (311303122), we get a palindrome (532606235).

Subtracting 221303113 from its reverse (311303122), we obtain a palindrome (90000009).

The spelling of 221303113 in words is "two hundred twenty-one million, three hundred three thousand, one hundred thirteen".