173233221 has 16 divisors (see below), whose sum is σ = 265993728. Its totient is φ = 98233200.

The previous prime is 173233219. The next prime is 173233231. The reversal of 173233221 is 122332371.

It is not a de Polignac number, because 173233221 - 2¹ = 173233219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 173233191 and 173233200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173233231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28735 + ... + 34236.

It is an arithmetic number, because the mean of its divisors is an integer number (16624608).

Almost surely, 2^173233221 is an apocalyptic number.

It is an amenable number.

173233221 is a deficient number, since it is larger than the sum of its proper divisors (92760507).

173233221 is a wasteful number, since it uses less digits than its factorization.

173233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63112.

The product of its digits is 1512, while the sum is 24.

The square root of 173233221 is about 13161.8091841509. The cubic root of 173233221 is about 557.4557423626.

Adding to 173233221 its reverse (122332371), we get a palindrome (295565592).

The spelling of 173233221 in words is "one hundred seventy-three million, two hundred thirty-three thousand, two hundred twenty-one".