82109015 has 8 divisors (see below), whose sum is σ = 99919008. Its totient is φ = 64761760.

The previous prime is 82108991. The next prime is 82109017. The reversal of 82109015 is 51090128.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82109015 - 2²⁰ = 81060439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82109017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115292 + ... + 116001.

It is an arithmetic number, because the mean of its divisors is an integer number (12489876).

Almost surely, 2^82109015 is an apocalyptic number.

82109015 is a deficient number, since it is larger than the sum of its proper divisors (17809993).

82109015 is a wasteful number, since it uses less digits than its factorization.

82109015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231369.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 82109015 is about 9061.4024852668. The cubic root of 82109015 is about 434.6405891955.

The spelling of 82109015 in words is "eighty-two million, one hundred nine thousand, fifteen".