82009515 has 16 divisors (see below), whose sum is σ = 149960448. Its totient is φ = 37490016.

The previous prime is 82009511. The next prime is 82009519. The reversal of 82009515 is 51590028.

It is an interprime number because it is at equal distance from previous prime (82009511) and next prime (82009519).

It is not a de Polignac number, because 82009515 - 2² = 82009511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82009511) 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, 390417 + ... + 390626.

It is an arithmetic number, because the mean of its divisors is an integer number (9372528).

Almost surely, 2^82009515 is an apocalyptic number.

82009515 is a deficient number, since it is larger than the sum of its proper divisors (67950933).

82009515 is a wasteful number, since it uses less digits than its factorization.

82009515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781058.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 82009515 is about 9055.9105008828. The cubic root of 82009515 is about 434.4649518868.

The spelling of 82009515 in words is "eighty-two million, nine thousand, five hundred fifteen".