531131612 has 48 divisors (see below), whose sum is σ = 1078479360. Its totient is φ = 226195200.

The previous prime is 531131599. The next prime is 531131621. The reversal of 531131612 is 216131135.

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, 177287 + ... + 180257.

It is an arithmetic number, because the mean of its divisors is an integer number (22468320).

Almost surely, 2^531131612 is an apocalyptic number.

It is an amenable number.

531131612 is an abundant number, since it is smaller than the sum of its proper divisors (547347748).

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

531131612 is a wasteful number, since it uses less digits than its factorization.

531131612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242 (or 3240 counting only the distinct ones).

The product of its digits is 540, while the sum is 23.

The square root of 531131612 is about 23046.2928038329. The cubic root of 531131612 is about 809.8427840990.

Adding to 531131612 its reverse (216131135), we get a palindrome (747262747).

The spelling of 531131612 in words is "five hundred thirty-one million, one hundred thirty-one thousand, six hundred twelve".