220967181 has 12 divisors (see below), whose sum is σ = 320547708. Its totient is φ = 146677824.

The previous prime is 220967179. The next prime is 220967189. The reversal of 220967181 is 181769022.

220967181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 28451556 + 192515625 = 5334^2 + 13875^2 .

It is not a de Polignac number, because 220967181 - 2¹ = 220967179 is a prime.

It is a super-2 number, since 2×220967181² = 97652990158173522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220967189) 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, 50590 + ... + 54783.

It is an arithmetic number, because the mean of its divisors is an integer number (26712309).

Almost surely, 2^220967181 is an apocalyptic number.

It is an amenable number.

220967181 is a deficient number, since it is larger than the sum of its proper divisors (99580527).

220967181 is a wasteful number, since it uses less digits than its factorization.

220967181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105612 (or 105609 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 220967181 is about 14864.9648839141. The cubic root of 220967181 is about 604.5644302429.

The spelling of 220967181 in words is "two hundred twenty million, nine hundred sixty-seven thousand, one hundred eighty-one".