221113313 has 4 divisors (see below), whose sum is σ = 228737940. Its totient is φ = 213488688.

The previous prime is 221113303. The next prime is 221113327. The reversal of 221113313 is 313311122.

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 34845409 + 186267904 = 5903^2 + 13648^2 .

It is a cyclic number.

It is not a de Polignac number, because 221113313 - 2¹⁶ = 221047777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221113291 and 221113300.

It is not an unprimeable number, because it can be changed into a prime (221113303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3812270 + ... + 3812327.

It is an arithmetic number, because the mean of its divisors is an integer number (57184485).

Almost surely, 2^221113313 is an apocalyptic number.

It is an amenable number.

221113313 is a deficient number, since it is larger than the sum of its proper divisors (7624627).

221113313 is an equidigital number, since it uses as much as digits as its factorization.

221113313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7624626.

The product of its digits is 108, while the sum is 17.

The square root of 221113313 is about 14869.8793875404. The cubic root of 221113313 is about 604.6976728671.

Adding to 221113313 its reverse (313311122), we get a palindrome (534424435).

The spelling of 221113313 in words is "two hundred twenty-one million, one hundred thirteen thousand, three hundred thirteen".