220854181 has 4 divisors (see below), whose sum is σ = 222443200. Its totient is φ = 219265164.

The previous prime is 220854173. The next prime is 220854223. The reversal of 220854181 is 181458022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220854181 - 2³ = 220854173 is a prime.

It is a super-2 number, since 2×220854181² = 97553138530361522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220854121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794301 + ... + 794578.

It is an arithmetic number, because the mean of its divisors is an integer number (55610800).

Almost surely, 2^220854181 is an apocalyptic number.

It is an amenable number.

220854181 is a deficient number, since it is larger than the sum of its proper divisors (1589019).

220854181 is a wasteful number, since it uses less digits than its factorization.

220854181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589018.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 220854181 is about 14861.1635143417. The cubic root of 220854181 is about 604.4613569737.

The spelling of 220854181 in words is "two hundred twenty million, eight hundred fifty-four thousand, one hundred eighty-one".