220002181 has 8 divisors (see below), whose sum is σ = 251527424. Its totient is φ = 188501040.

The previous prime is 220002179. The next prime is 220002193. The reversal of 220002181 is 181200022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220002181 - 2¹ = 220002179 is a prime.

It is a super-2 number, since 2×220002181² = 96801919289513522, 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 (220002131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22651 + ... + 30871.

It is an arithmetic number, because the mean of its divisors is an integer number (31440928).

Almost surely, 2^220002181 is an apocalyptic number.

It is an amenable number.

220002181 is a deficient number, since it is larger than the sum of its proper divisors (31525243).

220002181 is an equidigital number, since it uses as much as digits as its factorization.

220002181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12051.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 220002181 is about 14832.4704955041. The cubic root of 220002181 is about 603.6830685647.

The spelling of 220002181 in words is "two hundred twenty million, two thousand, one hundred eighty-one".