63212220 has 36 divisors (see below), whose sum is σ = 191744280. Its totient is φ = 16856544.

The previous prime is 63212209. The next prime is 63212251. The reversal of 63212220 is 2221236.

63212220 is a `hidden beast` number, since 632 + 12 + 2 + 20 = 666.

63212220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 63212193 and 63212202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 175410 + ... + 175769.

It is an arithmetic number, because the mean of its divisors is an integer number (5326230).

Almost surely, 2^63212220 is an apocalyptic number.

63212220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63212220 is an abundant number, since it is smaller than the sum of its proper divisors (128532060).

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

63212220 is a wasteful number, since it uses less digits than its factorization.

63212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351194 (or 351189 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 63212220 is about 7950.6112972526. The cubic root of 63212220 is about 398.3520113244.

Adding to 63212220 its reverse (2221236), we get a palindrome (65433456).

The spelling of 63212220 in words is "sixty-three million, two hundred twelve thousand, two hundred twenty".