173320055 has 4 divisors (see below), whose sum is σ = 207984072. Its totient is φ = 138656040.

The previous prime is 173320027. The next prime is 173320061. The reversal of 173320055 is 550023371.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550023371 = 379 ⋅1451249.

It is not a de Polignac number, because 173320055 - 2¹⁰ = 173319031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17332001 + ... + 17332010.

It is an arithmetic number, because the mean of its divisors is an integer number (51996018).

Almost surely, 2^173320055 is an apocalyptic number.

173320055 is a deficient number, since it is larger than the sum of its proper divisors (34664017).

173320055 is an equidigital number, since it uses as much as digits as its factorization.

173320055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34664016.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 173320055 is about 13165.1074815210. The cubic root of 173320055 is about 557.5488692775.

The spelling of 173320055 in words is "one hundred seventy-three million, three hundred twenty thousand, fifty-five".