221300213 has 2 divisors, whose sum is σ = 221300214. Its totient is φ = 221300212.

The previous prime is 221300171. The next prime is 221300221. The reversal of 221300213 is 312003122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135885649 + 85414564 = 11657^2 + 9242^2 .

It is a cyclic number.

It is not a de Polignac number, because 221300213 - 2²² = 217105909 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 (221300243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110650106 + 110650107.

It is an arithmetic number, because the mean of its divisors is an integer number (110650107).

Almost surely, 2^221300213 is an apocalyptic number.

It is an amenable number.

221300213 is a deficient number, since it is larger than the sum of its proper divisors (1).

221300213 is an equidigital number, since it uses as much as digits as its factorization.

221300213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 221300213 is about 14876.1625764173. The cubic root of 221300213 is about 604.8680020752.

Adding to 221300213 its reverse (312003122), we get a palindrome (533303335).

The spelling of 221300213 in words is "two hundred twenty-one million, three hundred thousand, two hundred thirteen".