173530 has 32 divisors (see below), whose sum is σ = 372096. Its totient is φ = 57024.

The previous prime is 173501. The next prime is 173531. The reversal of 173530 is 35371.

It is a super-2 number, since 2×173530² = 60225321800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 173498 and 173507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173531) 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, 2557 + ... + 2623.

It is an arithmetic number, because the mean of its divisors is an integer number (11628).

2¹⁷³⁵³⁰ is an apocalyptic number.

173530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

173530 is an abundant number, since it is smaller than the sum of its proper divisors (198566).

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

173530 is a wasteful number, since it uses less digits than its factorization.

173530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118.

The product of its (nonzero) digits is 315, while the sum is 19.

The square root of 173530 is about 416.5693219621. The cubic root of 173530 is about 55.7773900681. Note that the first 3 decimals are identical.

It can be divided in two parts, 173 and 530, that added together give a triangular number (703 = T₃₇).

The spelling of 173530 in words is "one hundred seventy-three thousand, five hundred thirty".