72171443 has 8 divisors (see below), whose sum is σ = 80439120. Its totient is φ = 64350720.

The previous prime is 72171413. The next prime is 72171457. The reversal of 72171443 is 34417127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72171443 - 2²⁰ = 71122867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72171403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111398 + ... + 112043.

It is an arithmetic number, because the mean of its divisors is an integer number (10054890).

Almost surely, 2^72171443 is an apocalyptic number.

72171443 is a deficient number, since it is larger than the sum of its proper divisors (8267677).

72171443 is a wasteful number, since it uses less digits than its factorization.

72171443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223477.

The product of its digits is 4704, while the sum is 29.

The square root of 72171443 is about 8495.3777432201. The cubic root of 72171443 is about 416.3467026960.

The spelling of 72171443 in words is "seventy-two million, one hundred seventy-one thousand, four hundred forty-three".