63281812 has 12 divisors (see below), whose sum is σ = 120810816. Its totient is φ = 28764440.

The previous prime is 63281797. The next prime is 63281831. The reversal of 63281812 is 21818236.

63281812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719068 + ... + 719155.

It is an arithmetic number, because the mean of its divisors is an integer number (10067568).

Almost surely, 2^63281812 is an apocalyptic number.

It is an amenable number.

63281812 is a deficient number, since it is larger than the sum of its proper divisors (57529004).

63281812 is a wasteful number, since it uses less digits than its factorization.

63281812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438238 (or 1438236 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 63281812 is about 7954.9866121823. The cubic root of 63281812 is about 398.4981431222.

The spelling of 63281812 in words is "sixty-three million, two hundred eighty-one thousand, eight hundred twelve".