63081220 has 24 divisors (see below), whose sum is σ = 140263704. Its totient is φ = 23748096.

The previous prime is 63081181. The next prime is 63081223. The reversal of 63081220 is 2218036.

It can be written as a sum of positive squares in 4 ways, for example, as 2334784 + 60746436 = 1528^2 + 7794^2 .

It is a junction number, because it is equal to n+sod(n) for n = 63081191 and 63081200.

It is not an unprimeable number, because it can be changed into a prime (63081223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92427 + ... + 93106.

It is an arithmetic number, because the mean of its divisors is an integer number (5844321).

Almost surely, 2^63081220 is an apocalyptic number.

It is an amenable number.

63081220 is an abundant number, since it is smaller than the sum of its proper divisors (77182484).

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

63081220 is a wasteful number, since it uses less digits than its factorization.

63081220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185559 (or 185557 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 63081220 is about 7942.3686643217. The cubic root of 63081220 is about 398.0766415538.

Adding to 63081220 its reverse (2218036), we get a palindrome (65299256).

The spelling of 63081220 in words is "sixty-three million, eighty-one thousand, two hundred twenty".