231134431064 has 16 divisors (see below), whose sum is σ = 456186377400. Its totient is φ = 109484730432.

The previous prime is 231134431049. The next prime is 231134431069. The reversal of 231134431064 is 460134431132.

It is a self number, because there is not a number n which added to its sum of digits gives 231134431064.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231134431069) 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, 760310477 + ... + 760310780.

Almost surely, 2^231134431064 is an apocalyptic number.

It is an amenable number.

231134431064 is a deficient number, since it is larger than the sum of its proper divisors (225051946336).

231134431064 is a wasteful number, since it uses less digits than its factorization.

231134431064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520621282 (or 1520621278 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 231134431064 its reverse (460134431132), we get a palindrome (691268862196).

The spelling of 231134431064 in words is "two hundred thirty-one billion, one hundred thirty-four million, four hundred thirty-one thousand, sixty-four".