82471815 has 12 divisors (see below), whose sum is σ = 142951224. Its totient is φ = 43984944.

The previous prime is 82471801. The next prime is 82471843. The reversal of 82471815 is 51817428.

It is not a de Polignac number, because 82471815 - 2⁵ = 82471783 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 82471815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 916309 + ... + 916398.

It is an arithmetic number, because the mean of its divisors is an integer number (11912602).

Almost surely, 2^82471815 is an apocalyptic number.

82471815 is a deficient number, since it is larger than the sum of its proper divisors (60479409).

82471815 is a wasteful number, since it uses less digits than its factorization.

82471815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832718 (or 1832715 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 82471815 is about 9081.3993965688. The cubic root of 82471815 is about 435.2798041295.

The spelling of 82471815 in words is "eighty-two million, four hundred seventy-one thousand, eight hundred fifteen".