43221888 has 96 divisors (see below), whose sum is σ = 131751360. Its totient is φ = 13553664.

The previous prime is 43221881. The next prime is 43221907. The reversal of 43221888 is 88812234.

It is a happy number.

43221888 is a `hidden beast` number, since 432 + 218 + 8 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43221881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18481 + ... + 20687.

It is an arithmetic number, because the mean of its divisors is an integer number (1372410).

Almost surely, 2^43221888 is an apocalyptic number.

43221888 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43221888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65875680).

43221888 is an abundant number, since it is smaller than the sum of its proper divisors (88529472).

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

43221888 is a wasteful number, since it uses less digits than its factorization.

43221888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244 (or 2229 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 43221888 is about 6574.3355557805. The cubic root of 43221888 is about 350.9413786728.

The spelling of 43221888 in words is "forty-three million, two hundred twenty-one thousand, eight hundred eighty-eight".