82311540 has 48 divisors (see below), whose sum is σ = 230973120. Its totient is φ = 21902080.

The previous prime is 82311533. The next prime is 82311571. The reversal of 82311540 is 4511328.

It is a self number, because there is not a number n which added to its sum of digits gives 82311540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32935 + ... + 35345.

It is an arithmetic number, because the mean of its divisors is an integer number (4811940).

Almost surely, 2^82311540 is an apocalyptic number.

It is an amenable number.

82311540 is an abundant number, since it is smaller than the sum of its proper divisors (148661580).

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

82311540 is a wasteful number, since it uses less digits than its factorization.

82311540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992 (or 2990 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 82311540 is about 9072.5707492419. The cubic root of 82311540 is about 434.9976482896.

Adding to 82311540 its reverse (4511328), we get a palindrome (86822868).

The spelling of 82311540 in words is "eighty-two million, three hundred eleven thousand, five hundred forty".