173252561 has 2 divisors, whose sum is σ = 173252562. Its totient is φ = 173252560.

The previous prime is 173252551. The next prime is 173252587. The reversal of 173252561 is 165252371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173080336 + 172225 = 13156^2 + 415^2 .

It is a cyclic number.

It is not a de Polignac number, because 173252561 - 2¹⁰ = 173251537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (173252531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86626280 + 86626281.

It is an arithmetic number, because the mean of its divisors is an integer number (86626281).

Almost surely, 2^173252561 is an apocalyptic number.

It is an amenable number.

173252561 is a deficient number, since it is larger than the sum of its proper divisors (1).

173252561 is an equidigital number, since it uses as much as digits as its factorization.

173252561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 32.

The square root of 173252561 is about 13162.5438650741. The cubic root of 173252561 is about 557.4764866379.

The spelling of 173252561 in words is "one hundred seventy-three million, two hundred fifty-two thousand, five hundred sixty-one".