220975913 has 2 divisors, whose sum is σ = 220975914. Its totient is φ = 220975912.

The previous prime is 220975901. The next prime is 220975933. The reversal of 220975913 is 319579022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178569769 + 42406144 = 13363^2 + 6512^2 .

It is a cyclic number.

It is not a de Polignac number, because 220975913 - 2¹⁰ = 220974889 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (220975933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110487956 + 110487957.

It is an arithmetic number, because the mean of its divisors is an integer number (110487957).

Almost surely, 2^220975913 is an apocalyptic number.

It is an amenable number.

220975913 is a deficient number, since it is larger than the sum of its proper divisors (1).

220975913 is an equidigital number, since it uses as much as digits as its factorization.

220975913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 220975913 is about 14865.2585917635. The cubic root of 220975913 is about 604.5723936986.

The spelling of 220975913 in words is "two hundred twenty million, nine hundred seventy-five thousand, nine hundred thirteen".