173228381 has 8 divisors (see below), whose sum is σ = 178658304. Its totient is φ = 167862240.

The previous prime is 173228357. The next prime is 173228389. The reversal of 173228381 is 183822371.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173228381 is a prime.

It is a super-2 number, since 2×173228381² = 60016143967762322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173228389) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 10400 + ... + 21321.

It is an arithmetic number, because the mean of its divisors is an integer number (22332288).

Almost surely, 2^173228381 is an apocalyptic number.

It is an amenable number.

173228381 is a deficient number, since it is larger than the sum of its proper divisors (5429923).

173228381 is a wasteful number, since it uses less digits than its factorization.

173228381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31891.

The product of its digits is 16128, while the sum is 35.

The square root of 173228381 is about 13161.6253175662. The cubic root of 173228381 is about 557.4505506892.

The spelling of 173228381 in words is "one hundred seventy-three million, two hundred twenty-eight thousand, three hundred eighty-one".