220381 has 8 divisors (see below), whose sum is σ = 265280. Its totient is φ = 178848.

The previous prime is 220373. The next prime is 220391. The reversal of 220381 is 183022.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 220381 - 2³ = 220373 is a prime.

It is a super-2 number, since 2×220381² = 97135570322, which contains 22 as substring.

It is a Duffinian number.

220381 is a lucky number.

It is a plaindrome in base 16.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220301) 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, 696 + ... + 961.

It is an arithmetic number, because the mean of its divisors is an integer number (33160).

2²²⁰³⁸¹ is an apocalyptic number.

It is an amenable number.

220381 is a deficient number, since it is larger than the sum of its proper divisors (44899).

220381 is a wasteful number, since it uses less digits than its factorization.

220381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 220381 is about 469.4475476558. The cubic root of 220381 is about 60.4029361320.

The spelling of 220381 in words is "two hundred twenty thousand, three hundred eighty-one".