173280145 has 16 divisors (see below), whose sum is σ = 215142480. Its totient is φ = 133888000.

The previous prime is 173280127. The next prime is 173280193. The reversal of 173280145 is 541082371.

It can be written as a sum of positive squares in 8 ways, for example, as 541696 + 172738449 = 736^2 + 13143^2 .

It is not a de Polignac number, because 173280145 - 2⁹ = 173279633 is a prime.

It is a super-3 number, since 3×173280145³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16521 + ... + 24889.

It is an arithmetic number, because the mean of its divisors is an integer number (13446405).

Almost surely, 2^173280145 is an apocalyptic number.

It is an amenable number.

173280145 is a deficient number, since it is larger than the sum of its proper divisors (41862335).

173280145 is a wasteful number, since it uses less digits than its factorization.

173280145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8516.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 173280145 is about 13163.5916451400. The cubic root of 173280145 is about 557.5060708382.

The spelling of 173280145 in words is "one hundred seventy-three million, two hundred eighty thousand, one hundred forty-five".