220204009081 has 27 divisors (see below), whose sum is σ = 262419655941. Its totient is φ = 184238591544.

The previous prime is 220204009043. The next prime is 220204009093. The reversal of 220204009081 is 180900402022.

The square root of 220204009081 is 469259.

It is a perfect power (a square), and thus also a powerful number.

220204009081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220204009081 - 2⁹ = 220204008569 is a prime.

It is a super-2 number, since 2×220204009081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220204009981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 141246180 + ... + 141247738.

Almost surely, 2^220204009081 is an apocalyptic number.

220204009081 is the 469259-th square number.

220204009081 is the 234630-th centered octagonal number.

It is an amenable number.

220204009081 is a deficient number, since it is larger than the sum of its proper divisors (42215646860).

220204009081 is an frugal number, since it uses more digits than its factorization.

220204009081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

Multiplying 220204009081 by its product of nonzero digits (2304), we get a square (507350036922624 = 22524432²).

The spelling of 220204009081 in words is "two hundred twenty billion, two hundred four million, nine thousand, eighty-one".