220464289 has 2 divisors, whose sum is σ = 220464290. Its totient is φ = 220464288.

The previous prime is 220464287. The next prime is 220464317. The reversal of 220464289 is 982464022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193766400 + 26697889 = 13920^2 + 5167^2 .

It is a cyclic number.

It is not a de Polignac number, because 220464289 - 2¹ = 220464287 is a prime.

Together with 220464287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (220464287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110232144 + 110232145.

It is an arithmetic number, because the mean of its divisors is an integer number (110232145).

Almost surely, 2^220464289 is an apocalyptic number.

It is an amenable number.

220464289 is a deficient number, since it is larger than the sum of its proper divisors (1).

220464289 is an equidigital number, since it uses as much as digits as its factorization.

220464289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 220464289 is about 14848.0399043106. The cubic root of 220464289 is about 604.1054457147.

It can be divided in two parts, 22046 and 4289, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 220464289 in words is "two hundred twenty million, four hundred sixty-four thousand, two hundred eighty-nine".