82173285 has 40 divisors (see below), whose sum is σ = 148478616. Its totient is φ = 43476480.

The previous prime is 82173241. The next prime is 82173361. The reversal of 82173285 is 58237128.

It can be written as a sum of positive squares in 4 ways, for example, as 8608356 + 73564929 = 2934^2 + 8577^2 .

It is not a de Polignac number, because 82173285 - 2¹⁵ = 82140517 is a prime.

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 39 ways as a sum of consecutive naturals, for example, 54745 + ... + 56225.

Almost surely, 2^82173285 is an apocalyptic number.

It is an amenable number.

82173285 is a deficient number, since it is larger than the sum of its proper divisors (66305331).

82173285 is a wasteful number, since it uses less digits than its factorization.

82173285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1626 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 82173285 is about 9064.9481520856. The cubic root of 82173285 is about 434.7539631265.

The spelling of 82173285 in words is "eighty-two million, one hundred seventy-three thousand, two hundred eighty-five".