221331043313 has 8 divisors (see below), whose sum is σ = 225518615208. Its totient is φ = 217143897984.

The previous prime is 221331043309. The next prime is 221331043327. The reversal of 221331043313 is 313340133122.

It can be written as a sum of positive squares in 4 ways, for example, as 43240291249 + 178090752064 = 207943^2 + 422008^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 221331043313 - 2² = 221331043309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221331043013) 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, 1060595 + ... + 1252007.

It is an arithmetic number, because the mean of its divisors is an integer number (28189826901).

Almost surely, 2^221331043313 is an apocalyptic number.

It is an amenable number.

221331043313 is a deficient number, since it is larger than the sum of its proper divisors (4187571895).

221331043313 is a wasteful number, since it uses less digits than its factorization.

221331043313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213283.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 221331043313 its reverse (313340133122), we get a palindrome (534671176435).

The spelling of 221331043313 in words is "two hundred twenty-one billion, three hundred thirty-one million, forty-three thousand, three hundred thirteen".