220535281 has 4 divisors (see below), whose sum is σ = 226495732. Its totient is φ = 214574832.

The previous prime is 220535243. The next prime is 220535291. The reversal of 220535281 is 182535022.

220535281 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 112042225 + 108493056 = 10585^2 + 10416^2 .

It is a cyclic number.

It is not a de Polignac number, because 220535281 - 2⁷ = 220535153 is a prime.

It is a super-2 number, since 2×220535281² = 97271620331497922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220535221) 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, 2980170 + ... + 2980243.

It is an arithmetic number, because the mean of its divisors is an integer number (56623933).

Almost surely, 2^220535281 is an apocalyptic number.

It is an amenable number.

220535281 is a deficient number, since it is larger than the sum of its proper divisors (5960451).

220535281 is an equidigital number, since it uses as much as digits as its factorization.

220535281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5960450.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 220535281 is about 14850.4303304652. The cubic root of 220535281 is about 604.1702816896.

The spelling of 220535281 in words is "two hundred twenty million, five hundred thirty-five thousand, two hundred eighty-one".