671171522 has 18 divisors (see below), whose sum is σ = 1171573497. Its totient is φ = 287535024.

The previous prime is 671171521. The next prime is 671171537. The reversal of 671171522 is 225171176.

It can be written as a sum of positive squares in 2 ways, for example, as 438944401 + 232227121 = 20951^2 + 15239^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=18319.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671171521) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 255158 + ... + 257774.

Almost surely, 2^671171522 is an apocalyptic number.

671171522 is a deficient number, since it is larger than the sum of its proper divisors (500401975).

671171522 is an frugal number, since it uses more digits than its factorization.

671171522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250 (or 2626 counting only the distinct ones).

The product of its digits is 5880, while the sum is 32.

The square root of 671171522 is about 25906.9782491127. The cubic root of 671171522 is about 875.5437260580.

Multiplying 671171522 by its sum of digits (32), we get a square (21477488704 = 146552²).

The spelling of 671171522 in words is "six hundred seventy-one million, one hundred seventy-one thousand, five hundred twenty-two".