172656271 has 2 divisors, whose sum is σ = 172656272. Its totient is φ = 172656270.

The previous prime is 172656241. The next prime is 172656277.

172656271 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 172656271 - 2⁹ = 172655759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172656271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172656277) 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, 86328135 + 86328136.

It is an arithmetic number, because the mean of its divisors is an integer number (86328136).

Almost surely, 2^172656271 is an apocalyptic number.

172656271 is a deficient number, since it is larger than the sum of its proper divisors (1).

172656271 is an equidigital number, since it uses as much as digits as its factorization.

172656271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 172656271 is about 13139.8733251124. The cubic root of 172656271 is about 556.8361887436.

The spelling of 172656271 in words is "one hundred seventy-two million, six hundred fifty-six thousand, two hundred seventy-one".