220511197 has 2 divisors, whose sum is σ = 220511198. Its totient is φ = 220511196.

The previous prime is 220511149. The next prime is 220511297. The reversal of 220511197 is 791115022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123409881 + 97101316 = 11109^2 + 9854^2 .

It is a cyclic number.

It is not a de Polignac number, because 220511197 - 2¹⁹ = 219986909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220511297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110255598 + 110255599.

It is an arithmetic number, because the mean of its divisors is an integer number (110255599).

Almost surely, 2^220511197 is an apocalyptic number.

It is an amenable number.

220511197 is a deficient number, since it is larger than the sum of its proper divisors (1).

220511197 is an equidigital number, since it uses as much as digits as its factorization.

220511197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 220511197 is about 14849.6194227327. The cubic root of 220511197 is about 604.1482876777.

The spelling of 220511197 in words is "two hundred twenty million, five hundred eleven thousand, one hundred ninety-seven".