231311230220232 has 48 divisors (see below), whose sum is σ = 638288064533340. Its totient is φ = 75648955794048.

The previous prime is 231311230220183. The next prime is 231311230220249. The reversal of 231311230220232 is 232022032113132.

231311230220232 is a `hidden beast` number, since 2 + 3 + 1 + 311 + 2 + 302 + 20 + 23 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 214313964765156 + 16997265455076 = 14639466^2 + 4122774^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231311230220196 and 231311230220205.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30308071423 + ... + 30308079054.

Almost surely, 2^{231311230220232} is an apocalyptic number.

It is an amenable number.

231311230220232 is an abundant number, since it is smaller than the sum of its proper divisors (406976834313108).

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

231311230220232 is a wasteful number, since it uses less digits than its factorization.

231311230220232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60616150542 (or 60616150535 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 231311230220232 its reverse (232022032113132), we get a palindrome (463333262333364).

The spelling of 231311230220232 in words is "two hundred thirty-one trillion, three hundred eleven billion, two hundred thirty million, two hundred twenty thousand, two hundred thirty-two".