82103865 has 24 divisors (see below), whose sum is σ = 133645824. Its totient is φ = 43041600.

The previous prime is 82103821. The next prime is 82103867. The reversal of 82103865 is 56830128.

It is a happy number.

It is not a de Polignac number, because 82103865 - 2¹⁰ = 82102841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82103867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55080 + ... + 56550.

It is an arithmetic number, because the mean of its divisors is an integer number (5568576).

Almost surely, 2^82103865 is an apocalyptic number.

It is an amenable number.

82103865 is a deficient number, since it is larger than the sum of its proper divisors (51541959).

82103865 is a wasteful number, since it uses less digits than its factorization.

82103865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601 (or 1540 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 82103865 is about 9061.1183084650. The cubic root of 82103865 is about 434.6315019033.

The spelling of 82103865 in words is "eighty-two million, one hundred three thousand, eight hundred sixty-five".