63281 has 2 divisors, whose sum is σ = 63282. Its totient is φ = 63280.

The previous prime is 63277. The next prime is 63299. The reversal of 63281 is 18236.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43681 + 19600 = 209^2 + 140^2 .

It is a cyclic number.

It is not a de Polignac number, because 63281 - 2² = 63277 is a prime.

It is a super-2 number, since 2×63281² = 8008969922, which contains 22 as substring.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 63281.

It is not a weakly prime, because it can be changed into another prime (63211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31640 + 31641.

It is an arithmetic number, because the mean of its divisors is an integer number (31641).

2⁶³²⁸¹ is an apocalyptic number.

63281 is the 113-rd centered decagonal number.

It is an amenable number.

63281 is a deficient number, since it is larger than the sum of its proper divisors (1).

63281 is an equidigital number, since it uses as much as digits as its factorization.

63281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 20.

The square root of 63281 is about 251.5571505642. The cubic root of 63281 is about 39.8496438673.

The spelling of 63281 in words is "sixty-three thousand, two hundred eighty-one".