63221284 has 48 divisors (see below), whose sum is σ = 134149120. Its totient is φ = 25466400.

The previous prime is 63221281. The next prime is 63221287. The reversal of 63221284 is 48212236.

It is an interprime number because it is at equal distance from previous prime (63221281) and next prime (63221287).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (63221281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79939 + ... + 80725.

Almost surely, 2^63221284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63221284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67074560).

63221284 is an abundant number, since it is smaller than the sum of its proper divisors (70927836).

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

63221284 is a wasteful number, since it uses less digits than its factorization.

63221284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968 (or 966 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 63221284 is about 7951.1812958830. The cubic root of 63221284 is about 398.3710503122.

The spelling of 63221284 in words is "sixty-three million, two hundred twenty-one thousand, two hundred eighty-four".