531155712 has 72 divisors (see below), whose sum is σ = 1422656704. Its totient is φ = 175924224.

The previous prime is 531155707. The next prime is 531155717. The reversal of 531155712 is 217551135.

It is an interprime number because it is at equal distance from previous prime (531155707) and next prime (531155717).

It is a self number, because there is not a number n which added to its sum of digits gives 531155712.

It is not an unprimeable number, because it can be changed into a prime (531155717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123063 + ... + 127305.

Almost surely, 2^531155712 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 531155712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (711328352).

531155712 is an abundant number, since it is smaller than the sum of its proper divisors (891500992).

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

531155712 is a wasteful number, since it uses less digits than its factorization.

531155712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425 (or 4411 counting only the distinct ones).

The product of its digits is 5250, while the sum is 30.

The square root of 531155712 is about 23046.8156585677. The cubic root of 531155712 is about 809.8550327366.

The spelling of 531155712 in words is "five hundred thirty-one million, one hundred fifty-five thousand, seven hundred twelve".