231513454212 has 24 divisors (see below), whose sum is σ = 540220445856. Its totient is φ = 77167953408.

The previous prime is 231513454201. The next prime is 231513454247. The reversal of 231513454212 is 212454315132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88413 + ... + 686180.

It is an arithmetic number, because the mean of its divisors is an integer number (22509185244).

Almost surely, 2^231513454212 is an apocalyptic number.

It is an amenable number.

231513454212 is an abundant number, since it is smaller than the sum of its proper divisors (308706991644).

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

231513454212 is a wasteful number, since it uses less digits than its factorization.

231513454212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799507 (or 799505 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

Adding to 231513454212 its reverse (212454315132), we get a palindrome (443967769344).

The spelling of 231513454212 in words is "two hundred thirty-one billion, five hundred thirteen million, four hundred fifty-four thousand, two hundred twelve".