63281065 has 4 divisors (see below), whose sum is σ = 75937284. Its totient is φ = 50624848.

The previous prime is 63281059. The next prime is 63281069. The reversal of 63281065 is 56018236.

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 28847641 + 34433424 = 5371^2 + 5868^2 .

It is a cyclic number.

It is not a de Polignac number, because 63281065 - 2²³ = 54892457 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63281069) 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, 6328102 + ... + 6328111.

It is an arithmetic number, because the mean of its divisors is an integer number (18984321).

Almost surely, 2^63281065 is an apocalyptic number.

It is an amenable number.

63281065 is a deficient number, since it is larger than the sum of its proper divisors (12656219).

63281065 is a wasteful number, since it uses less digits than its factorization.

63281065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12656218.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 63281065 is about 7954.9396603620. The cubic root of 63281065 is about 398.4965751135.

The spelling of 63281065 in words is "sixty-three million, two hundred eighty-one thousand, sixty-five".