172273238 has 4 divisors (see below), whose sum is σ = 258409860. Its totient is φ = 86136618.

The previous prime is 172273219. The next prime is 172273259. The reversal of 172273238 is 832372271.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 172273198 and 172273207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43068308 + ... + 43068311.

It is an arithmetic number, because the mean of its divisors is an integer number (64602465).

Almost surely, 2^172273238 is an apocalyptic number.

172273238 is a deficient number, since it is larger than the sum of its proper divisors (86136622).

172273238 is an equidigital number, since it uses as much as digits as its factorization.

172273238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86136621.

The product of its digits is 28224, while the sum is 35.

The square root of 172273238 is about 13125.2900158435. The cubic root of 172273238 is about 556.4241088102.

The spelling of 172273238 in words is "one hundred seventy-two million, two hundred seventy-three thousand, two hundred thirty-eight".