531115212 has 12 divisors (see below), whose sum is σ = 1239268856. Its totient is φ = 177038400.

The previous prime is 531115201. The next prime is 531115213. The reversal of 531115212 is 212511135.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (531115213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22129789 + ... + 22129812.

Almost surely, 2^531115212 is an apocalyptic number.

It is an amenable number.

531115212 is an abundant number, since it is smaller than the sum of its proper divisors (708153644).

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

531115212 is a wasteful number, since it uses less digits than its factorization.

531115212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44259608 (or 44259606 counting only the distinct ones).

The product of its digits is 300, while the sum is 21.

The square root of 531115212 is about 23045.9369954879. The cubic root of 531115212 is about 809.8344487146.

Adding to 531115212 its reverse (212511135), we get a palindrome (743626347).

The spelling of 531115212 in words is "five hundred thirty-one million, one hundred fifteen thousand, two hundred twelve".