220474913 has 2 divisors, whose sum is σ = 220474914. Its totient is φ = 220474912.

The previous prime is 220474909. The next prime is 220474927. The reversal of 220474913 is 319474022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219247249 + 1227664 = 14807^2 + 1108^2 .

It is a cyclic number.

It is not a de Polignac number, because 220474913 - 2² = 220474909 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 220474913.

It is not a weakly prime, because it can be changed into another prime (220474973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110237456 + 110237457.

It is an arithmetic number, because the mean of its divisors is an integer number (110237457).

Almost surely, 2^220474913 is an apocalyptic number.

It is an amenable number.

220474913 is a deficient number, since it is larger than the sum of its proper divisors (1).

220474913 is an equidigital number, since it uses as much as digits as its factorization.

220474913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 220474913 is about 14848.3976576599. The cubic root of 220474913 is about 604.1151493470.

The spelling of 220474913 in words is "two hundred twenty million, four hundred seventy-four thousand, nine hundred thirteen".