173225645 has 4 divisors (see below), whose sum is σ = 207870780. Its totient is φ = 138580512.

The previous prime is 173225621. The next prime is 173225651. The reversal of 173225645 is 546522371.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546522371 = 29 ⋅18845599.

It can be written as a sum of positive squares in 2 ways, for example, as 51652969 + 121572676 = 7187^2 + 11026^2 .

It is a cyclic number.

It is not a de Polignac number, because 173225645 - 2¹² = 173221549 is a prime.

It is a super-3 number, since 3×173225645³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17322560 + ... + 17322569.

It is an arithmetic number, because the mean of its divisors is an integer number (51967695).

Almost surely, 2^173225645 is an apocalyptic number.

It is an amenable number.

173225645 is a deficient number, since it is larger than the sum of its proper divisors (34645135).

173225645 is an equidigital number, since it uses as much as digits as its factorization.

173225645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34645134.

The product of its digits is 50400, while the sum is 35.

The square root of 173225645 is about 13161.5213786249. The cubic root of 173225645 is about 557.4476158492.

The spelling of 173225645 in words is "one hundred seventy-three million, two hundred twenty-five thousand, six hundred forty-five".