63645222 has 16 divisors (see below), whose sum is σ = 127825920. Its totient is φ = 21125832.

The previous prime is 63645221. The next prime is 63645223. The reversal of 63645222 is 22254636.

63645222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (63645221) and next prime (63645223).

It is a self number, because there is not a number n which added to its sum of digits gives 63645222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63645221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20758 + ... + 23625.

It is an arithmetic number, because the mean of its divisors is an integer number (7989120).

Almost surely, 2^63645222 is an apocalyptic number.

63645222 is an abundant number, since it is smaller than the sum of its proper divisors (64180698).

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

63645222 is a wasteful number, since it uses less digits than its factorization.

63645222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44627.

The product of its digits is 17280, while the sum is 30.

The square root of 63645222 is about 7977.7955601783. The cubic root of 63645222 is about 399.2595091960.

Adding to 63645222 its reverse (22254636), we get a palindrome (85899858).

The spelling of 63645222 in words is "sixty-three million, six hundred forty-five thousand, two hundred twenty-two".