173201220 has 96 divisors (see below), whose sum is σ = 552061440. Its totient is φ = 45054720.

The previous prime is 173201213. The next prime is 173201243. The reversal of 173201220 is 22102371.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 173201193 and 173201202.

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 31 ways as a sum of consecutive naturals, for example, 18229 + ... + 26051.

It is an arithmetic number, because the mean of its divisors is an integer number (5750640).

Almost surely, 2^173201220 is an apocalyptic number.

173201220 is a gapful number since it is divisible by the number (10) 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 173201220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276030720).

173201220 is an abundant number, since it is smaller than the sum of its proper divisors (378860220).

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

173201220 is a wasteful number, since it uses less digits than its factorization.

173201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7882 (or 7874 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 173201220 is about 13160.5934516647. The cubic root of 173201220 is about 557.4214143824.

Adding to 173201220 its reverse (22102371), we get a palindrome (195303591).

The spelling of 173201220 in words is "one hundred seventy-three million, two hundred one thousand, two hundred twenty".