221313341 has 2 divisors, whose sum is σ = 221313342. Its totient is φ = 221313340.

The previous prime is 221313299. The next prime is 221313347. The reversal of 221313341 is 143313122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200647225 + 20666116 = 14165^2 + 4546^2 .

It is a cyclic number.

It is not a de Polignac number, because 221313341 - 2⁶ = 221313277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221313347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110656670 + 110656671.

It is an arithmetic number, because the mean of its divisors is an integer number (110656671).

Almost surely, 2^221313341 is an apocalyptic number.

It is an amenable number.

221313341 is a deficient number, since it is larger than the sum of its proper divisors (1).

221313341 is an equidigital number, since it uses as much as digits as its factorization.

221313341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 20.

The square root of 221313341 is about 14876.6038126986. The cubic root of 221313341 is about 604.8799625248.

Adding to 221313341 its reverse (143313122), we get a palindrome (364626463).

The spelling of 221313341 in words is "two hundred twenty-one million, three hundred thirteen thousand, three hundred forty-one".