220487281 has 8 divisors (see below), whose sum is σ = 252878144. Its totient is φ = 188319600.

The previous prime is 220487257. The next prime is 220487321. The reversal of 220487281 is 182784022.

220487281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 220487281 - 2⁵ = 220487249 is a prime.

It is a super-3 number, since 3×220487281³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220487231) 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, 53670 + ... + 57631.

It is an arithmetic number, because the mean of its divisors is an integer number (31609768).

Almost surely, 2^220487281 is an apocalyptic number.

It is an amenable number.

220487281 is a deficient number, since it is larger than the sum of its proper divisors (32390863).

220487281 is a wasteful number, since it uses less digits than its factorization.

220487281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111591.

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 220487281 is about 14848.8141277342. The cubic root of 220487281 is about 604.1264455021.

The spelling of 220487281 in words is "two hundred twenty million, four hundred eighty-seven thousand, two hundred eighty-one".