63251220 has 48 divisors (see below), whose sum is σ = 187524288. Its totient is φ = 15874560.

The previous prime is 63251213. The next prime is 63251239. The reversal of 63251220 is 2215236.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 29986 + ... + 32025.

It is an arithmetic number, because the mean of its divisors is an integer number (3906756).

Almost surely, 2^63251220 is an apocalyptic number.

63251220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63251220 is an abundant number, since it is smaller than the sum of its proper divisors (124273068).

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

63251220 is a wasteful number, since it uses less digits than its factorization.

63251220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62040 (or 62038 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 63251220 is about 7953.0635606664. The cubic root of 63251220 is about 398.4339181377.

Adding to 63251220 its reverse (2215236), we get a palindrome (65466456).

The spelling of 63251220 in words is "sixty-three million, two hundred fifty-one thousand, two hundred twenty".