8172134219 has 4 divisors (see below), whose sum is σ = 8362183896. Its totient is φ = 7982084544.

The previous prime is 8172134207. The next prime is 8172134221. The reversal of 8172134219 is 9124312718.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9124312718 = 2 ⋅4562156359.

It is a cyclic number.

It is not a de Polignac number, because 8172134219 - 2²⁸ = 7903698763 is a prime.

It is a super-2 number, since 2×8172134219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8172134239) 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, 95024774 + ... + 95024859.

It is an arithmetic number, because the mean of its divisors is an integer number (2090545974).

Almost surely, 2^8172134219 is an apocalyptic number.

8172134219 is a deficient number, since it is larger than the sum of its proper divisors (190049677).

8172134219 is a wasteful number, since it uses less digits than its factorization.

8172134219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190049676.

The product of its digits is 24192, while the sum is 38.

The square root of 8172134219 is about 90399.8574058610. The cubic root of 8172134219 is about 2014.2428481150.

The spelling of 8172134219 in words is "eight billion, one hundred seventy-two million, one hundred thirty-four thousand, two hundred nineteen".