220342813 has 2 divisors, whose sum is σ = 220342814. Its totient is φ = 220342812.

The previous prime is 220342799. The next prime is 220342819. The reversal of 220342813 is 318243022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181629529 + 38713284 = 13477^2 + 6222^2 .

It is a cyclic number.

It is not a de Polignac number, because 220342813 - 2⁵ = 220342781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220342819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110171406 + 110171407.

It is an arithmetic number, because the mean of its divisors is an integer number (110171407).

Almost surely, 2^220342813 is an apocalyptic number.

It is an amenable number.

220342813 is a deficient number, since it is larger than the sum of its proper divisors (1).

220342813 is an equidigital number, since it uses as much as digits as its factorization.

220342813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 220342813 is about 14843.9486997227. The cubic root of 220342813 is about 603.9944711349.

Adding to 220342813 its reverse (318243022), we get a palindrome (538585835).

The spelling of 220342813 in words is "two hundred twenty million, three hundred forty-two thousand, eight hundred thirteen".