82102540 has 24 divisors (see below), whose sum is σ = 185678640. Its totient is φ = 30314688.

The previous prime is 82102529. The next prime is 82102543. The reversal of 82102540 is 4520128.

It is not an unprimeable number, because it can be changed into a prime (82102543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157630 + ... + 158149.

It is an arithmetic number, because the mean of its divisors is an integer number (7736610).

Almost surely, 2^82102540 is an apocalyptic number.

It is an amenable number.

82102540 is an abundant number, since it is smaller than the sum of its proper divisors (103576100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82102540 is a wasteful number, since it uses less digits than its factorization.

82102540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315801 (or 315799 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 82102540 is about 9061.0451935745. The cubic root of 82102540 is about 434.6291638492.

Adding to 82102540 its reverse (4520128), we get a palindrome (86622668).

The spelling of 82102540 in words is "eighty-two million, one hundred two thousand, five hundred forty".