531215412 has 96 divisors (see below), whose sum is σ = 1532977152. Its totient is φ = 139418496.

The previous prime is 531215407. The next prime is 531215413. The reversal of 531215412 is 214512135.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531215413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 246813 + ... + 248955.

It is an arithmetic number, because the mean of its divisors is an integer number (15968512).

Almost surely, 2^531215412 is an apocalyptic number.

531215412 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 531215412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766488576).

531215412 is an abundant number, since it is smaller than the sum of its proper divisors (1001761740).

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

531215412 is a wasteful number, since it uses less digits than its factorization.

531215412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397 (or 2395 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 531215412 is about 23048.1108119516. The cubic root of 531215412 is about 809.8853732017.

Adding to 531215412 its reverse (214512135), we get a palindrome (745727547).

The spelling of 531215412 in words is "five hundred thirty-one million, two hundred fifteen thousand, four hundred twelve".