220681161 has 12 divisors (see below), whose sum is σ = 319459140. Its totient is φ = 146798880.

The previous prime is 220681141. The next prime is 220681171. The reversal of 220681161 is 161186022.

It can be written as a sum of positive squares in 2 ways, for example, as 158760000 + 61921161 = 12600^2 + 7869^2 .

It is not a de Polignac number, because 220681161 - 2⁵ = 220681129 is a prime.

It is a super-3 number, since 3×220681161³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (220681141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22446 + ... + 30743.

It is an arithmetic number, because the mean of its divisors is an integer number (26621595).

Almost surely, 2^220681161 is an apocalyptic number.

It is an amenable number.

220681161 is a deficient number, since it is larger than the sum of its proper divisors (98777979).

220681161 is a wasteful number, since it uses less digits than its factorization.

220681161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53656 (or 53653 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 220681161 is about 14855.3411606735. The cubic root of 220681161 is about 604.3034681407.

The spelling of 220681161 in words is "two hundred twenty million, six hundred eighty-one thousand, one hundred sixty-one".