173255421 has 4 divisors (see below), whose sum is σ = 231007232. Its totient is φ = 115503612.

The previous prime is 173255419. The next prime is 173255431. The reversal of 173255421 is 124552371.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124552371 = 3 ⋅41517457.

It is not a de Polignac number, because 173255421 - 2¹ = 173255419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173255431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28875901 + ... + 28875906.

It is an arithmetic number, because the mean of its divisors is an integer number (57751808).

Almost surely, 2^173255421 is an apocalyptic number.

It is an amenable number.

173255421 is a deficient number, since it is larger than the sum of its proper divisors (57751811).

173255421 is an equidigital number, since it uses as much as digits as its factorization.

173255421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57751810.

The product of its digits is 8400, while the sum is 30.

The square root of 173255421 is about 13162.6525062390. The cubic root of 173255421 is about 557.4795541712.

The spelling of 173255421 in words is "one hundred seventy-three million, two hundred fifty-five thousand, four hundred twenty-one".