221333113 has 4 divisors (see below), whose sum is σ = 221447268. Its totient is φ = 221218960.

The previous prime is 221333089. The next prime is 221333143. The reversal of 221333113 is 311333122.

221333113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311333122 = 2 ⋅155666561.

It can be written as a sum of positive squares in 2 ways, for example, as 146821689 + 74511424 = 12117^2 + 8632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221333113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221333143) 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, 54118 + ... + 58063.

It is an arithmetic number, because the mean of its divisors is an integer number (55361817).

Almost surely, 2^221333113 is an apocalyptic number.

It is an amenable number.

221333113 is a deficient number, since it is larger than the sum of its proper divisors (114155).

221333113 is a wasteful number, since it uses less digits than its factorization.

221333113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114154.

The product of its digits is 324, while the sum is 19.

The square root of 221333113 is about 14877.2683312495. The cubic root of 221333113 is about 604.8979751917.

Adding to 221333113 its reverse (311333122), we get a palindrome (532666235).

Subtracting 221333113 from its reverse (311333122), we obtain a palindrome (90000009).

The spelling of 221333113 in words is "two hundred twenty-one million, three hundred thirty-three thousand, one hundred thirteen".