172165471 has 2 divisors, whose sum is σ = 172165472. Its totient is φ = 172165470.

The previous prime is 172165459. The next prime is 172165493. The reversal of 172165471 is 174561271.

It is a weak prime.

It is an emirp because it is prime and its reverse (174561271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172165471 - 2¹¹ = 172163423 is a prime.

It is a super-3 number, since 3×172165471³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172165451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86082735 + 86082736.

It is an arithmetic number, because the mean of its divisors is an integer number (86082736).

Almost surely, 2^172165471 is an apocalyptic number.

172165471 is a deficient number, since it is larger than the sum of its proper divisors (1).

172165471 is an equidigital number, since it uses as much as digits as its factorization.

172165471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 34.

The square root of 172165471 is about 13121.1840548024. The cubic root of 172165471 is about 556.3080593187.

The spelling of 172165471 in words is "one hundred seventy-two million, one hundred sixty-five thousand, four hundred seventy-one".