221344113 has 4 divisors (see below), whose sum is σ = 295125488. Its totient is φ = 147562740.

The previous prime is 221344087. The next prime is 221344121. The reversal of 221344113 is 311443122.

221344113 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 221344113 - 2²² = 217149809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221344113.

It is not an unprimeable number, because it can be changed into a prime (221344163) 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, 36890683 + ... + 36890688.

It is an arithmetic number, because the mean of its divisors is an integer number (73781372).

Almost surely, 2^221344113 is an apocalyptic number.

It is an amenable number.

221344113 is a deficient number, since it is larger than the sum of its proper divisors (73781375).

221344113 is an equidigital number, since it uses as much as digits as its factorization.

221344113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73781374.

The product of its digits is 576, while the sum is 21.

The square root of 221344113 is about 14877.6380181802. The cubic root of 221344113 is about 604.9079959359.

Adding to 221344113 its reverse (311443122), we get a palindrome (532787235).

Subtracting 221344113 from its reverse (311443122), we obtain a palindrome (90099009).

The spelling of 221344113 in words is "two hundred twenty-one million, three hundred forty-four thousand, one hundred thirteen".