220339813 has 2 divisors, whose sum is σ = 220339814. Its totient is φ = 220339812.

The previous prime is 220339799. The next prime is 220339817. The reversal of 220339813 is 318933022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201129124 + 19210689 = 14182^2 + 4383^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220339813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220339817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110169906 + 110169907.

It is an arithmetic number, because the mean of its divisors is an integer number (110169907).

Almost surely, 2^220339813 is an apocalyptic number.

It is an amenable number.

220339813 is a deficient number, since it is larger than the sum of its proper divisors (1).

220339813 is an equidigital number, since it uses as much as digits as its factorization.

220339813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 220339813 is about 14843.8476480999. The cubic root of 220339813 is about 603.9917299644.

The spelling of 220339813 in words is "two hundred twenty million, three hundred thirty-nine thousand, eight hundred thirteen".