173220416 has 56 divisors (see below), whose sum is σ = 364418880. Its totient is φ = 81464832.

The previous prime is 173220407. The next prime is 173220457. The reversal of 173220416 is 614022371.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202646 + ... + 203498.

It is an arithmetic number, because the mean of its divisors is an integer number (6507480).

Almost surely, 2^173220416 is an apocalyptic number.

173220416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 173220416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182209440).

173220416 is an abundant number, since it is smaller than the sum of its proper divisors (191198464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

173220416 is a wasteful number, since it uses less digits than its factorization.

173220416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051 (or 1041 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 173220416 is about 13161.3227298779. The cubic root of 173220416 is about 557.4420067434.

Adding to 173220416 its reverse (614022371), we get a palindrome (787242787).

The spelling of 173220416 in words is "one hundred seventy-three million, two hundred twenty thousand, four hundred sixteen".