531213712 has 40 divisors (see below), whose sum is σ = 1058682240. Its totient is φ = 258059520.

The previous prime is 531213707. The next prime is 531213713. The reversal of 531213712 is 217312135.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (531213713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170989 + ... + 174067.

It is an arithmetic number, because the mean of its divisors is an integer number (26467056).

Almost surely, 2^531213712 is an apocalyptic number.

It is an amenable number.

531213712 is a deficient number, since it is larger than the sum of its proper divisors (527468528).

531213712 is a wasteful number, since it uses less digits than its factorization.

531213712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391 (or 3385 counting only the distinct ones).

The product of its digits is 1260, while the sum is 25.

The square root of 531213712 is about 23048.0739325437. The cubic root of 531213712 is about 809.8845092668.

Adding to 531213712 its reverse (217312135), we get a palindrome (748525847).

The spelling of 531213712 in words is "five hundred thirty-one million, two hundred thirteen thousand, seven hundred twelve".