43215872 has 44 divisors (see below), whose sum is σ = 98747280. Its totient is φ = 18518016.

The previous prime is 43215847. The next prime is 43215883. The reversal of 43215872 is 27851234.

It is a super-2 number, since 2×43215872² = 3735223185440768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4154 + ... + 10182.

Almost surely, 2^43215872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43215872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49373640).

43215872 is an abundant number, since it is smaller than the sum of its proper divisors (55531408).

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

43215872 is an equidigital number, since it uses as much as digits as its factorization.

43215872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6056 (or 6038 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 43215872 is about 6573.8780031272. The cubic root of 43215872 is about 350.9250955549.

The spelling of 43215872 in words is "forty-three million, two hundred fifteen thousand, eight hundred seventy-two".