173530243 has 4 divisors (see below), whose sum is σ = 174170848. Its totient is φ = 172889640.

The previous prime is 173530213. The next prime is 173530261. The reversal of 173530243 is 342035371.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342035371 = 16741 ⋅20431.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173530243 is a prime.

It is a super-2 number, since 2×173530243² = 60225490471278098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173530213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319896 + ... + 320437.

It is an arithmetic number, because the mean of its divisors is an integer number (43542712).

Almost surely, 2^173530243 is an apocalyptic number.

173530243 is a deficient number, since it is larger than the sum of its proper divisors (640605).

173530243 is an equidigital number, since it uses as much as digits as its factorization.

173530243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640604.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 173530243 is about 13173.0878308770. The cubic root of 173530243 is about 557.7741610378.

The spelling of 173530243 in words is "one hundred seventy-three million, five hundred thirty thousand, two hundred forty-three".