43172371 has 4 divisors (see below), whose sum is σ = 47097144. Its totient is φ = 39247600.

The previous prime is 43172359. The next prime is 43172383. The reversal of 43172371 is 17327134.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (43172359) and next prime (43172383).

It is a cyclic number.

It is not a de Polignac number, because 43172371 - 2²¹ = 41075219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43172971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1962370 + ... + 1962391.

It is an arithmetic number, because the mean of its divisors is an integer number (11774286).

Almost surely, 2^43172371 is an apocalyptic number.

43172371 is a deficient number, since it is larger than the sum of its proper divisors (3924773).

43172371 is a wasteful number, since it uses less digits than its factorization.

43172371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924772.

The product of its digits is 3528, while the sum is 28.

The square root of 43172371 is about 6570.5685446543. The cubic root of 43172371 is about 350.8073092197.

The spelling of 43172371 in words is "forty-three million, one hundred seventy-two thousand, three hundred seventy-one".