171896225 has 12 divisors (see below), whose sum is σ = 217174716. Its totient is φ = 134921280.

The previous prime is 171896213. The next prime is 171896233. The reversal of 171896225 is 522698171.

It can be written as a sum of positive squares in 6 ways, for example, as 364816 + 171531409 = 604^2 + 13097^2 .

It is not a de Polignac number, because 171896225 - 2¹² = 171892129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63542 + ... + 66191.

It is an arithmetic number, because the mean of its divisors is an integer number (18097893).

Almost surely, 2^171896225 is an apocalyptic number.

It is an amenable number.

171896225 is a deficient number, since it is larger than the sum of its proper divisors (45278491).

171896225 is a wasteful number, since it uses less digits than its factorization.

171896225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129796 (or 129791 counting only the distinct ones).

The product of its digits is 60480, while the sum is 41.

The square root of 171896225 is about 13110.9200668756. The cubic root of 171896225 is about 556.0179084772.

The spelling of 171896225 in words is "one hundred seventy-one million, eight hundred ninety-six thousand, two hundred twenty-five".