172522871 has 4 divisors (see below), whose sum is σ = 174886272. Its totient is φ = 170159472.

The previous prime is 172522813. The next prime is 172522879. The reversal of 172522871 is 178225271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172522871 - 2¹⁴ = 172506487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172522879) 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, 1181591 + ... + 1181736.

It is an arithmetic number, because the mean of its divisors is an integer number (43721568).

Almost surely, 2^172522871 is an apocalyptic number.

172522871 is a deficient number, since it is larger than the sum of its proper divisors (2363401).

172522871 is an equidigital number, since it uses as much as digits as its factorization.

172522871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363400.

The product of its digits is 15680, while the sum is 35.

The square root of 172522871 is about 13134.7961917953. The cubic root of 172522871 is about 556.6927417159.

The spelling of 172522871 in words is "one hundred seventy-two million, five hundred twenty-two thousand, eight hundred seventy-one".