173226661 has 8 divisors (see below), whose sum is σ = 177629760. Its totient is φ = 168840672.

The previous prime is 173226653. The next prime is 173226679. The reversal of 173226661 is 166622371.

It is a happy number.

173226661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 173226661 - 2³ = 173226653 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 (173226611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17625 + ... + 25633.

It is an arithmetic number, because the mean of its divisors is an integer number (22203720).

Almost surely, 2^173226661 is an apocalyptic number.

It is an amenable number.

173226661 is a deficient number, since it is larger than the sum of its proper divisors (4403099).

173226661 is an equidigital number, since it uses as much as digits as its factorization.

173226661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8555.

The product of its digits is 18144, while the sum is 34.

The square root of 173226661 is about 13161.5599759299. The cubic root of 173226661 is about 557.4487056911.

The spelling of 173226661 in words is "one hundred seventy-three million, two hundred twenty-six thousand, six hundred sixty-one".