515531982 has 64 divisors (see below), whose sum is σ = 1235533824. Its totient is φ = 140210400.

The previous prime is 515531917. The next prime is 515532013. The reversal of 515531982 is 289135515.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 515531982.

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 31 ways as a sum of consecutive naturals, for example, 218107 + ... + 220457.

It is an arithmetic number, because the mean of its divisors is an integer number (19305216).

Almost surely, 2^515531982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 515531982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (617766912).

515531982 is an abundant number, since it is smaller than the sum of its proper divisors (720001842).

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

515531982 is a wasteful number, since it uses less digits than its factorization.

515531982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613.

The product of its digits is 54000, while the sum is 39.

The square root of 515531982 is about 22705.3293744002. The cubic root of 515531982 is about 801.8353600551.

It can be divided in two parts, 51553 and 1982, that added together give a palindrome (53535).

The spelling of 515531982 in words is "five hundred fifteen million, five hundred thirty-one thousand, nine hundred eighty-two".