63101220 has 216 divisors, whose sum is σ = 224308224. Its totient is φ = 13208832.

The previous prime is 63101209. The next prime is 63101237. The reversal of 63101220 is 2210136.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 63101220.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 496797 + ... + 496923.

It is an arithmetic number, because the mean of its divisors is an integer number (1038464).

Almost surely, 2^63101220 is an apocalyptic number.

63101220 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 63101220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112154112).

63101220 is an abundant number, since it is smaller than the sum of its proper divisors (161207004).

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

63101220 is a wasteful number, since it uses less digits than its factorization.

63101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 63101220 is about 7943.6276347775. The cubic root of 63101220 is about 398.1187073835.

Adding to 63101220 its reverse (2210136), we get a palindrome (65311356).

The spelling of 63101220 in words is "sixty-three million, one hundred one thousand, two hundred twenty".