43221998 has 16 divisors (see below), whose sum is σ = 70448640. Its totient is φ = 19812600.

The previous prime is 43221961. The next prime is 43222033. The reversal of 43221998 is 89912234.

It is a super-2 number, since 2×43221998² = 3736282222224008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

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, 17168 + ... + 19523.

It is an arithmetic number, because the mean of its divisors is an integer number (4403040).

Almost surely, 2^43221998 is an apocalyptic number.

43221998 is a deficient number, since it is larger than the sum of its proper divisors (27226642).

43221998 is a wasteful number, since it uses less digits than its factorization.

43221998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36743.

The product of its digits is 31104, while the sum is 38.

The square root of 43221998 is about 6574.3439216396. The cubic root of 43221998 is about 350.9416763886.

The spelling of 43221998 in words is "forty-three million, two hundred twenty-one thousand, nine hundred ninety-eight".