43220172 has 12 divisors (see below), whose sum is σ = 100847096. Its totient is φ = 14406720.

The previous prime is 43220143. The next prime is 43220183. The reversal of 43220172 is 27102234.

It is a tau number, because it is divible by the number of its divisors (12).

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, 1800829 + ... + 1800852.

Almost surely, 2^43220172 is an apocalyptic number.

It is an amenable number.

43220172 is an abundant number, since it is smaller than the sum of its proper divisors (57626924).

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

43220172 is a wasteful number, since it uses less digits than its factorization.

43220172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601688 (or 3601686 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 43220172 is about 6574.2050470000. The cubic root of 43220172 is about 350.9367342407.

It can be divided in two parts, 432 and 20172, that multiplied together give a square (8714304 = 2952²).

The spelling of 43220172 in words is "forty-three million, two hundred twenty thousand, one hundred seventy-two".