220132261 has 2 divisors, whose sum is σ = 220132262. Its totient is φ = 220132260.

The previous prime is 220132259. The next prime is 220132273. The reversal of 220132261 is 162231022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209699361 + 10432900 = 14481^2 + 3230^2 .

It is a cyclic number.

It is not a de Polignac number, because 220132261 - 2¹ = 220132259 is a prime.

Together with 220132259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220132061) 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, 110066130 + 110066131.

It is an arithmetic number, because the mean of its divisors is an integer number (110066131).

Almost surely, 2^220132261 is an apocalyptic number.

It is an amenable number.

220132261 is a deficient number, since it is larger than the sum of its proper divisors (1).

220132261 is an equidigital number, since it uses as much as digits as its factorization.

220132261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 220132261 is about 14836.8548216932. The cubic root of 220132261 is about 603.8020243882.

Adding to 220132261 its reverse (162231022), we get a palindrome (382363283).

The spelling of 220132261 in words is "two hundred twenty million, one hundred thirty-two thousand, two hundred sixty-one".