220705081 has 2 divisors, whose sum is σ = 220705082. Its totient is φ = 220705080.

The previous prime is 220705057. The next prime is 220705087. The reversal of 220705081 is 180507022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121881600 + 98823481 = 11040^2 + 9941^2 .

It is a cyclic number.

It is not a de Polignac number, because 220705081 - 2⁹ = 220704569 is a prime.

It is a super-2 number, since 2×220705081² = 97421465558433122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220705087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110352540 + 110352541.

It is an arithmetic number, because the mean of its divisors is an integer number (110352541).

Almost surely, 2^220705081 is an apocalyptic number.

It is an amenable number.

220705081 is a deficient number, since it is larger than the sum of its proper divisors (1).

220705081 is an equidigital number, since it uses as much as digits as its factorization.

220705081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 220705081 is about 14856.1462364908. The cubic root of 220705081 is about 604.3253011730.

The spelling of 220705081 in words is "two hundred twenty million, seven hundred five thousand, eighty-one".