82919815 has 16 divisors (see below), whose sum is σ = 108732960. Its totient is φ = 60203520.

The previous prime is 82919813. The next prime is 82919833. The reversal of 82919815 is 51891928.

It is not a de Polignac number, because 82919815 - 2¹ = 82919813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82919813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50731 + ... + 52339.

It is an arithmetic number, because the mean of its divisors is an integer number (6795810).

Almost surely, 2^82919815 is an apocalyptic number.

82919815 is a deficient number, since it is larger than the sum of its proper divisors (25813145).

82919815 is a wasteful number, since it uses less digits than its factorization.

82919815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562.

The product of its digits is 51840, while the sum is 43.

The square root of 82919815 is about 9106.0317921694. The cubic root of 82919815 is about 436.0665509471.

The spelling of 82919815 in words is "eighty-two million, nine hundred nineteen thousand, eight hundred fifteen".