43221000 has 64 divisors (see below), whose sum is σ = 134858880. Its totient is φ = 11524800.

The previous prime is 43220951. The next prime is 43221019. The reversal of 43221000 is 12234.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4204 + ... + 10203.

It is an arithmetic number, because the mean of its divisors is an integer number (2107170).

Almost surely, 2^43221000 is an apocalyptic number.

43221000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43221000 is an abundant number, since it is smaller than the sum of its proper divisors (91637880).

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

43221000 is a wasteful number, since it uses less digits than its factorization.

43221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14431 (or 14417 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 43221000 is about 6574.2680200917. The cubic root of 43221000 is about 350.9389752757.

Adding to 43221000 its reverse (12234), we get a palindrome (43233234).

The spelling of 43221000 in words is "forty-three million, two hundred twenty-one thousand".