531445512 has 64 divisors (see below), whose sum is σ = 1439424000. Its totient is φ = 163505472.

The previous prime is 531445487. The next prime is 531445513. The reversal of 531445512 is 215544135.

It is a self number, because there is not a number n which added to its sum of digits gives 531445512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531445513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47689 + ... + 57767.

It is an arithmetic number, because the mean of its divisors is an integer number (22491000).

Almost surely, 2^531445512 is an apocalyptic number.

531445512 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531445512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719712000).

531445512 is an abundant number, since it is smaller than the sum of its proper divisors (907978488).

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

531445512 is a wasteful number, since it uses less digits than its factorization.

531445512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10127 (or 10097 counting only the distinct ones).

The product of its digits is 12000, while the sum is 30.

The square root of 531445512 is about 23053.1020038519. The cubic root of 531445512 is about 810.0022923270.

Adding to 531445512 its reverse (215544135), we get a palindrome (746989647).

The spelling of 531445512 in words is "five hundred thirty-one million, four hundred forty-five thousand, five hundred twelve".