173221330 has 16 divisors (see below), whose sum is σ = 330139800. Its totient is φ = 65212672.

The previous prime is 173221319. The next prime is 173221357. The reversal of 173221330 is 33122371.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 173211921 + 9409 = 13161^2 + 97^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509305 + ... + 509644.

Almost surely, 2^173221330 is an apocalyptic number.

173221330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

173221330 is a deficient number, since it is larger than the sum of its proper divisors (156918470).

173221330 is a wasteful number, since it uses less digits than its factorization.

173221330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018973.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 173221330 is about 13161.3574527858. The cubic root of 173221330 is about 557.4429871920.

The spelling of 173221330 in words is "one hundred seventy-three million, two hundred twenty-one thousand, three hundred thirty".