173221123 has 8 divisors (see below), whose sum is σ = 175124592. Its totient is φ = 171323136.

The previous prime is 173221121. The next prime is 173221127. The reversal of 173221123 is 321122371.

It is a happy number.

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 173221123 - 2¹ = 173221121 is a prime.

It is a super-2 number, since 2×173221123² = 60011114906762258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 173221094 and 173221103.

It is not an unprimeable number, because it can be changed into a prime (173221121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103711 + ... + 105367.

It is an arithmetic number, because the mean of its divisors is an integer number (21890574).

Almost surely, 2^173221123 is an apocalyptic number.

173221123 is a deficient number, since it is larger than the sum of its proper divisors (1903469).

173221123 is a wasteful number, since it uses less digits than its factorization.

173221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741.

The product of its digits is 504, while the sum is 22.

The square root of 173221123 is about 13161.3495888530. The cubic root of 173221123 is about 557.4427651432.

Adding to 173221123 its reverse (321122371), we get a palindrome (494343494).

The spelling of 173221123 in words is "one hundred seventy-three million, two hundred twenty-one thousand, one hundred twenty-three".