220884581 has 2 divisors, whose sum is σ = 220884582. Its totient is φ = 220884580.

The previous prime is 220884569. The next prime is 220884583. The reversal of 220884581 is 185488022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173343556 + 47541025 = 13166^2 + 6895^2 .

It is a cyclic number.

It is not a de Polignac number, because 220884581 - 2¹⁰ = 220883557 is a prime.

It is a super-2 number, since 2×220884581² = 97579996247091122, which contains 22 as substring.

Together with 220884583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220884583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110442290 + 110442291.

It is an arithmetic number, because the mean of its divisors is an integer number (110442291).

Almost surely, 2^220884581 is an apocalyptic number.

It is an amenable number.

220884581 is a deficient number, since it is larger than the sum of its proper divisors (1).

220884581 is an equidigital number, since it uses as much as digits as its factorization.

220884581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40960, while the sum is 38.

The square root of 220884581 is about 14862.1862792794. The cubic root of 220884581 is about 604.4890898759.

The spelling of 220884581 in words is "two hundred twenty million, eight hundred eighty-four thousand, five hundred eighty-one".