82509215 has 8 divisors (see below), whose sum is σ = 99146400. Its totient is φ = 65917152.

The previous prime is 82509157. The next prime is 82509239. The reversal of 82509215 is 51290528.

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 82509215 - 2¹⁴ = 82492831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7115 + ... + 14684.

It is an arithmetic number, because the mean of its divisors is an integer number (12393300).

Almost surely, 2^82509215 is an apocalyptic number.

82509215 is a deficient number, since it is larger than the sum of its proper divisors (16637185).

82509215 is a wasteful number, since it uses less digits than its factorization.

82509215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22561.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 82509215 is about 9083.4583171829. The cubic root of 82509215 is about 435.3455922796.

The spelling of 82509215 in words is "eighty-two million, five hundred nine thousand, two hundred fifteen".