82515787 has 2 divisors, whose sum is σ = 82515788. Its totient is φ = 82515786.

The previous prime is 82515751. The next prime is 82515827. The reversal of 82515787 is 78751528.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82515787 - 2¹⁵ = 82483019 is a prime.

It is not a weakly prime, because it can be changed into another prime (82515187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41257893 + 41257894.

It is an arithmetic number, because the mean of its divisors is an integer number (41257894).

Almost surely, 2^82515787 is an apocalyptic number.

82515787 is a deficient number, since it is larger than the sum of its proper divisors (1).

82515787 is an equidigital number, since it uses as much as digits as its factorization.

82515787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 156800, while the sum is 43.

The square root of 82515787 is about 9083.8200664698. The cubic root of 82515787 is about 435.3571506462.

The spelling of 82515787 in words is "eighty-two million, five hundred fifteen thousand, seven hundred eighty-seven".