63221136 has 40 divisors (see below), whose sum is σ = 178170144. Its totient is φ = 19157760.

The previous prime is 63221117. The next prime is 63221143. The reversal of 63221136 is 63112236.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59341 + ... + 60396.

Almost surely, 2^63221136 is an apocalyptic number.

63221136 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

63221136 is an abundant number, since it is smaller than the sum of its proper divisors (114949008).

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

63221136 is a wasteful number, since it uses less digits than its factorization.

63221136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119759 (or 119753 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 63221136 is about 7951.1719890844. The cubic root of 63221136 is about 398.3707394519.

Subtracting from 63221136 its reverse (63112236), we obtain a square (108900 = 330²).

The spelling of 63221136 in words is "sixty-three million, two hundred twenty-one thousand, one hundred thirty-six".