63545220 has 72 divisors (see below), whose sum is σ = 193415040. Its totient is φ = 16887360.

The previous prime is 63545219. The next prime is 63545227. The reversal of 63545220 is 2254536.

63545220 is a `hidden beast` number, since 635 + 4 + 5 + 2 + 20 = 666.

It is not an unprimeable number, because it can be changed into a prime (63545227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88021 + ... + 88739.

It is an arithmetic number, because the mean of its divisors is an integer number (2686320).

Almost surely, 2^63545220 is an apocalyptic number.

63545220 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 63545220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96707520).

63545220 is an abundant number, since it is smaller than the sum of its proper divisors (129869820).

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

63545220 is a wasteful number, since it uses less digits than its factorization.

63545220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225 (or 1220 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 63545220 is about 7971.5255754466. The cubic root of 63545220 is about 399.0502885717.

Adding to 63545220 its reverse (2254536), we get a palindrome (65799756).

The spelling of 63545220 in words is "sixty-three million, five hundred forty-five thousand, two hundred twenty".