231136005612 has 24 divisors (see below), whose sum is σ = 542111742256. Its totient is φ = 76646135808.

The previous prime is 231136005599. The next prime is 231136005647. The reversal of 231136005612 is 216500631132.

It is a self number, because there is not a number n which added to its sum of digits gives 231136005612.

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, 49897513 + ... + 49902144.

Almost surely, 2^231136005612 is an apocalyptic number.

It is an amenable number.

231136005612 is an abundant number, since it is smaller than the sum of its proper divisors (310975736644).

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

231136005612 is a wasteful number, since it uses less digits than its factorization.

231136005612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99799857 (or 99799855 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

Adding to 231136005612 its reverse (216500631132), we get a palindrome (447636636744).

The spelling of 231136005612 in words is "two hundred thirty-one billion, one hundred thirty-six million, five thousand, six hundred twelve".