8002172131 has 2 divisors, whose sum is σ = 8002172132. Its totient is φ = 8002172130.

The previous prime is 8002172071. The next prime is 8002172177. The reversal of 8002172131 is 1312712008.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8002172131 - 2²⁹ = 7465301219 is a prime.

It is a super-2 number, since 2×8002172131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8002172096 and 8002172105.

It is not a weakly prime, because it can be changed into another prime (8002179131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4001086065 + 4001086066.

It is an arithmetic number, because the mean of its divisors is an integer number (4001086066).

Almost surely, 2^8002172131 is an apocalyptic number.

8002172131 is a deficient number, since it is larger than the sum of its proper divisors (1).

8002172131 is an equidigital number, since it uses as much as digits as its factorization.

8002172131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 8002172131 is about 89454.8608573061. The cubic root of 8002172131 is about 2000.1809945367.

Adding to 8002172131 its reverse (1312712008), we get a palindrome (9314884139).

The spelling of 8002172131 in words is "eight billion, two million, one hundred seventy-two thousand, one hundred thirty-one".