220997269 has 2 divisors, whose sum is σ = 220997270. Its totient is φ = 220997268.

The previous prime is 220997251. The next prime is 220997291. The reversal of 220997269 is 962799022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124211025 + 96786244 = 11145^2 + 9838^2 .

It is a cyclic number.

It is not a de Polignac number, because 220997269 - 2¹¹ = 220995221 is a prime.

It is a super-2 number, since 2×220997269² = 97679585810916722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220997209) 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, 110498634 + 110498635.

It is an arithmetic number, because the mean of its divisors is an integer number (110498635).

Almost surely, 2^220997269 is an apocalyptic number.

It is an amenable number.

220997269 is a deficient number, since it is larger than the sum of its proper divisors (1).

220997269 is an equidigital number, since it uses as much as digits as its factorization.

220997269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 220997269 is about 14865.9768935647. The cubic root of 220997269 is about 604.5918691729.

The spelling of 220997269 in words is "two hundred twenty million, nine hundred ninety-seven thousand, two hundred sixty-nine".