505131812 has 12 divisors (see below), whose sum is σ = 935979660. Its totient is φ = 237709056.

The previous prime is 505131811. The next prime is 505131841. The reversal of 505131812 is 218131505.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 259081216 + 246050596 = 16096^2 + 15686^2 .

It is not an unprimeable number, because it can be changed into a prime (505131811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3714137 + ... + 3714272.

It is an arithmetic number, because the mean of its divisors is an integer number (77998305).

Almost surely, 2^505131812 is an apocalyptic number.

It is an amenable number.

505131812 is a deficient number, since it is larger than the sum of its proper divisors (430847848).

505131812 is a wasteful number, since it uses less digits than its factorization.

505131812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7428430 (or 7428428 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 505131812 is about 22475.1376414028. The cubic root of 505131812 is about 796.4067031870.

It can be divided in two parts, 50513 and 1812, that added together give a palindrome (52325).

The spelling of 505131812 in words is "five hundred five million, one hundred thirty-one thousand, eight hundred twelve".