220064081 has 2 divisors, whose sum is σ = 220064082. Its totient is φ = 220064080.

The previous prime is 220064063. The next prime is 220064107. The reversal of 220064081 is 180460022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167935681 + 52128400 = 12959^2 + 7220^2 .

It is a cyclic number.

It is not a de Polignac number, because 220064081 - 2²² = 215869777 is a prime.

It is a super-2 number, since 2×220064081² = 96856399492749122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220064051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110032040 + 110032041.

It is an arithmetic number, because the mean of its divisors is an integer number (110032041).

Almost surely, 2^220064081 is an apocalyptic number.

It is an amenable number.

220064081 is a deficient number, since it is larger than the sum of its proper divisors (1).

220064081 is an equidigital number, since it uses as much as digits as its factorization.

220064081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 220064081 is about 14834.5569869814. The cubic root of 220064081 is about 603.7396808487.

The spelling of 220064081 in words is "two hundred twenty million, sixty-four thousand, eighty-one".