63281999220 has 192 divisors, whose sum is σ = 194787936000. Its totient is φ = 15223357440.

The previous prime is 63281999201. The next prime is 63281999227. The reversal of 63281999220 is 2299918236.

It is a happy number.

It is a super-2 number, since 2×63281999220² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63281999227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 59196846 + ... + 59197914.

It is an arithmetic number, because the mean of its divisors is an integer number (1014520500).

Almost surely, 2^63281999220 is an apocalyptic number.

63281999220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63281999220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97393968000).

63281999220 is an abundant number, since it is smaller than the sum of its proper divisors (131505936780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63281999220 is a wasteful number, since it uses less digits than its factorization.

63281999220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698 (or 1696 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 51.

The spelling of 63281999220 in words is "sixty-three billion, two hundred eighty-one million, nine hundred ninety-nine thousand, two hundred twenty".