220481 has 4 divisors (see below), whose sum is σ = 222852. Its totient is φ = 218112.

The previous prime is 220471. The next prime is 220511. The reversal of 220481 is 184022.

220481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 152881 + 67600 = 391^2 + 260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220481 is a prime.

It is a super-2 number, since 2×220481² = 97223742722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1040 + ... + 1233.

It is an arithmetic number, because the mean of its divisors is an integer number (55713).

2²²⁰⁴⁸¹ is an apocalyptic number.

It is an amenable number.

220481 is a deficient number, since it is larger than the sum of its proper divisors (2371).

220481 is an equidigital number, since it uses as much as digits as its factorization.

220481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 220481 is about 469.5540437479. The cubic root of 220481 is about 60.4120708884.

The spelling of 220481 in words is "two hundred twenty thousand, four hundred eighty-one".