172732271 has 2 divisors, whose sum is σ = 172732272. Its totient is φ = 172732270.

The previous prime is 172732267. The next prime is 172732289. The reversal of 172732271 is 172237271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172732271 - 2² = 172732267 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172732201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86366135 + 86366136.

It is an arithmetic number, because the mean of its divisors is an integer number (86366136).

Almost surely, 2^172732271 is an apocalyptic number.

172732271 is a deficient number, since it is larger than the sum of its proper divisors (1).

172732271 is an equidigital number, since it uses as much as digits as its factorization.

172732271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8232, while the sum is 32.

The square root of 172732271 is about 13142.7649678445. The cubic root of 172732271 is about 556.9178796512.

The spelling of 172732271 in words is "one hundred seventy-two million, seven hundred thirty-two thousand, two hundred seventy-one".