231213534345 has 32 divisors (see below), whose sum is σ = 411096470400. Its totient is φ = 123298828992.

The previous prime is 231213534313. The next prime is 231213534359. The reversal of 231213534345 is 543435312132.

231213534345 is a `hidden beast` number, since 2 + 3 + 1 + 213 + 5 + 3 + 434 + 5 = 666.

231213534345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231213534345 - 2⁵ = 231213534313 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1052479 + ... + 1253051.

It is an arithmetic number, because the mean of its divisors is an integer number (12846764700).

Almost surely, 2^231213534345 is an apocalyptic number.

It is an amenable number.

231213534345 is a deficient number, since it is larger than the sum of its proper divisors (179882936055).

231213534345 is a wasteful number, since it uses less digits than its factorization.

231213534345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209126 (or 209120 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

Adding to 231213534345 its reverse (543435312132), we get a palindrome (774648846477).

The spelling of 231213534345 in words is "two hundred thirty-one billion, two hundred thirteen million, five hundred thirty-four thousand, three hundred forty-five".