171479221 has 8 divisors (see below), whose sum is σ = 184992984. Its totient is φ = 158346240.

The previous prime is 171479177. The next prime is 171479249. The reversal of 171479221 is 122974171.

It can be written as a sum of positive squares in 4 ways, for example, as 123454321 + 48024900 = 11111^2 + 6930^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 171479221 - 2¹⁵ = 171446453 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 (171479621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94260 + ... + 96061.

It is an arithmetic number, because the mean of its divisors is an integer number (23124123).

Almost surely, 2^171479221 is an apocalyptic number.

It is an amenable number.

171479221 is a deficient number, since it is larger than the sum of its proper divisors (13513763).

171479221 is a wasteful number, since it uses less digits than its factorization.

171479221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190391.

The product of its digits is 7056, while the sum is 34.

The square root of 171479221 is about 13095.0074837703. The cubic root of 171479221 is about 555.5679287748.

The spelling of 171479221 in words is "one hundred seventy-one million, four hundred seventy-nine thousand, two hundred twenty-one".