173172872243 has 16 divisors (see below), whose sum is σ = 209315639040. Its totient is φ = 139955104800.

The previous prime is 173172872239. The next prime is 173172872303. The reversal of 173172872243 is 342278271371.

It is not a de Polignac number, because 173172872243 - 2² = 173172872239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173172872233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3057368 + ... + 3113493.

It is an arithmetic number, because the mean of its divisors is an integer number (13082227440).

Almost surely, 2^173172872243 is an apocalyptic number.

173172872243 is a deficient number, since it is larger than the sum of its proper divisors (36142766797).

173172872243 is a wasteful number, since it uses less digits than its factorization.

173172872243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6171098.

The product of its digits is 790272, while the sum is 47.

The spelling of 173172872243 in words is "one hundred seventy-three billion, one hundred seventy-two million, eight hundred seventy-two thousand, two hundred forty-three".