531135135212 has 72 divisors (see below), whose sum is σ = 1034385539040. Its totient is φ = 238426144000.

The previous prime is 531135135197. The next prime is 531135135221. The reversal of 531135135212 is 212531531135.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38201462 + ... + 38215362.

It is an arithmetic number, because the mean of its divisors is an integer number (14366465820).

Almost surely, 2^531135135212 is an apocalyptic number.

It is an amenable number.

531135135212 is a deficient number, since it is larger than the sum of its proper divisors (503250403828).

531135135212 is a wasteful number, since it uses less digits than its factorization.

531135135212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14903 (or 14890 counting only the distinct ones).

The product of its digits is 13500, while the sum is 32.

Adding to 531135135212 its reverse (212531531135), we get a palindrome (743666666347).

The spelling of 531135135212 in words is "five hundred thirty-one billion, one hundred thirty-five million, one hundred thirty-five thousand, two hundred twelve".