173221071 has 8 divisors (see below), whose sum is σ = 236332800. Its totient is φ = 112795032.

The previous prime is 173221067. The next prime is 173221117. The reversal of 173221071 is 170122371.

173221071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 173221071 - 2² = 173221067 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173221001) 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, 671271 + ... + 671528.

It is an arithmetic number, because the mean of its divisors is an integer number (29541600).

Almost surely, 2^173221071 is an apocalyptic number.

173221071 is a deficient number, since it is larger than the sum of its proper divisors (63111729).

173221071 is a wasteful number, since it uses less digits than its factorization.

173221071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342845.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 173221071 is about 13161.3476133715. The cubic root of 173221071 is about 557.4427093628.

The spelling of 173221071 in words is "one hundred seventy-three million, two hundred twenty-one thousand, seventy-one".