531531612 has 96 divisors (see below), whose sum is σ = 1456358400. Its totient is φ = 167184000.

The previous prime is 531531599. The next prime is 531531653. The reversal of 531531612 is 216135135.

531531612 is a `hidden beast` number, since 5 + 3 + 15 + 31 + 612 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 884112 + ... + 884712.

It is an arithmetic number, because the mean of its divisors is an integer number (15170400).

Almost surely, 2^531531612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531531612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (728179200).

531531612 is an abundant number, since it is smaller than the sum of its proper divisors (924826788).

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

531531612 is a wasteful number, since it uses less digits than its factorization.

531531612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064 (or 1056 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 531531612 is about 23054.9693558677. The cubic root of 531531612 is about 810.0460330491.

Adding to 531531612 its reverse (216135135), we get a palindrome (747666747).

The spelling of 531531612 in words is "five hundred thirty-one million, five hundred thirty-one thousand, six hundred twelve".