173228681 has 4 divisors (see below), whose sum is σ = 182346000. Its totient is φ = 164111364.

The previous prime is 173228677. The next prime is 173228689. The reversal of 173228681 is 186822371.

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.

It is a cyclic number.

It is not a de Polignac number, because 173228681 - 2² = 173228677 is a prime.

It is a super-2 number, since 2×173228681² = 60016351841999522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173228689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4558631 + ... + 4558668.

It is an arithmetic number, because the mean of its divisors is an integer number (45586500).

Almost surely, 2^173228681 is an apocalyptic number.

It is an amenable number.

173228681 is a deficient number, since it is larger than the sum of its proper divisors (9117319).

173228681 is an equidigital number, since it uses as much as digits as its factorization.

173228681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9117318.

The product of its digits is 32256, while the sum is 38.

The square root of 173228681 is about 13161.6367143300. The cubic root of 173228681 is about 557.4508724900.

The spelling of 173228681 in words is "one hundred seventy-three million, two hundred twenty-eight thousand, six hundred eighty-one".