63218444 has 48 divisors (see below), whose sum is σ = 123959808. Its totient is φ = 28055808.

The previous prime is 63218411. The next prime is 63218447. The reversal of 63218444 is 44481236.

It is a super-2 number, since 2×63218444² = 7993143323562272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 63218444.

It is not an unprimeable number, because it can be changed into a prime (63218447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129569 + ... + 130055.

It is an arithmetic number, because the mean of its divisors is an integer number (2582496).

Almost surely, 2^63218444 is an apocalyptic number.

It is an amenable number.

63218444 is a deficient number, since it is larger than the sum of its proper divisors (60741364).

63218444 is a wasteful number, since it uses less digits than its factorization.

63218444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614 (or 612 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 63218444 is about 7951.0027040619. The cubic root of 63218444 is about 398.3650850705.

The spelling of 63218444 in words is "sixty-three million, two hundred eighteen thousand, four hundred forty-four".