82850815 has 4 divisors (see below), whose sum is σ = 99420984. Its totient is φ = 66280648.

The previous prime is 82850813. The next prime is 82850821. The reversal of 82850815 is 51805828.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82850815 - 2¹ = 82850813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82850813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8285077 + ... + 8285086.

It is an arithmetic number, because the mean of its divisors is an integer number (24855246).

Almost surely, 2^82850815 is an apocalyptic number.

82850815 is a deficient number, since it is larger than the sum of its proper divisors (16570169).

82850815 is a wasteful number, since it uses less digits than its factorization.

82850815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16570168.

The product of its (nonzero) digits is 25600, while the sum is 37.

The square root of 82850815 is about 9102.2423061573. The cubic root of 82850815 is about 435.9455628104.

The spelling of 82850815 in words is "eighty-two million, eight hundred fifty thousand, eight hundred fifteen".