220505269 has 2 divisors, whose sum is σ = 220505270. Its totient is φ = 220505268.

The previous prime is 220505261. The next prime is 220505287. The reversal of 220505269 is 962505022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211324369 + 9180900 = 14537^2 + 3030^2 .

It is a cyclic number.

It is not a de Polignac number, because 220505269 - 2³ = 220505261 is a prime.

It is a super-2 number, since 2×220505269² = 97245147313524722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220505269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220505261) 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, 110252634 + 110252635.

It is an arithmetic number, because the mean of its divisors is an integer number (110252635).

Almost surely, 2^220505269 is an apocalyptic number.

It is an amenable number.

220505269 is a deficient number, since it is larger than the sum of its proper divisors (1).

220505269 is an equidigital number, since it uses as much as digits as its factorization.

220505269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 220505269 is about 14849.4198203162. The cubic root of 220505269 is about 604.1428738586.

The spelling of 220505269 in words is "two hundred twenty million, five hundred five thousand, two hundred sixty-nine".