63261220 has 36 divisors (see below), whose sum is σ = 146029212. Its totient is φ = 23003200.

The previous prime is 63261197. The next prime is 63261227. The reversal of 63261220 is 2216236.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 33732864 + 29528356 = 5808^2 + 5434^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 63261191 and 63261200.

It is not an unprimeable number, because it can be changed into a prime (63261227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10651 + ... + 15490.

It is an arithmetic number, because the mean of its divisors is an integer number (4056367).

Almost surely, 2^63261220 is an apocalyptic number.

It is an amenable number.

63261220 is an abundant number, since it is smaller than the sum of its proper divisors (82767992).

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

63261220 is a wasteful number, since it uses less digits than its factorization.

63261220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26172 (or 26159 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 63261220 is about 7953.6922243698. The cubic root of 63261220 is about 398.4549144612.

Adding to 63261220 its reverse (2216236), we get a palindrome (65477456).

The spelling of 63261220 in words is "sixty-three million, two hundred sixty-one thousand, two hundred twenty".