82131015 has 16 divisors (see below), whose sum is σ = 138326400. Its totient is φ = 41497632.

The previous prime is 82131013. The next prime is 82131019. The reversal of 82131015 is 51013128.

It is not a de Polignac number, because 82131015 - 2¹ = 82131013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 82130982 and 82131000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82131013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143805 + ... + 144374.

It is an arithmetic number, because the mean of its divisors is an integer number (8645400).

Almost surely, 2^82131015 is an apocalyptic number.

82131015 is a deficient number, since it is larger than the sum of its proper divisors (56195385).

82131015 is a wasteful number, since it uses less digits than its factorization.

82131015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288206.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 82131015 is about 9062.6163440808. The cubic root of 82131015 is about 434.6794044181.

The spelling of 82131015 in words is "eighty-two million, one hundred thirty-one thousand, fifteen".