82420515 has 24 divisors (see below), whose sum is σ = 143089440. Its totient is φ = 43887744.

The previous prime is 82420501. The next prime is 82420543. The reversal of 82420515 is 51502428.

It is a happy number.

It is not a de Polignac number, because 82420515 - 2⁵ = 82420483 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 40359 + ... + 42351.

It is an arithmetic number, because the mean of its divisors is an integer number (5962060).

Almost surely, 2^82420515 is an apocalyptic number.

82420515 is a deficient number, since it is larger than the sum of its proper divisors (60668925).

82420515 is a wasteful number, since it uses less digits than its factorization.

82420515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923 (or 2920 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 82420515 is about 9078.5745026408. The cubic root of 82420515 is about 435.1895329441.

The spelling of 82420515 in words is "eighty-two million, four hundred twenty thousand, five hundred fifteen".