173228520 has 32 divisors (see below), whose sum is σ = 519685920. Its totient is φ = 46194240.

The previous prime is 173228507. The next prime is 173228551. The reversal of 173228520 is 25822371.

173228520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 721666 + ... + 721905.

It is an arithmetic number, because the mean of its divisors is an integer number (16240185).

Almost surely, 2^173228520 is an apocalyptic number.

173228520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

173228520 is an abundant number, since it is smaller than the sum of its proper divisors (346457400).

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

173228520 is a wasteful number, since it uses less digits than its factorization.

173228520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443585 (or 1443581 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 173228520 is about 13161.6305980680. The cubic root of 173228520 is about 557.4506997903.

The spelling of 173228520 in words is "one hundred seventy-three million, two hundred twenty-eight thousand, five hundred twenty".