231332653512 has 256 divisors, whose sum is σ = 661568083200. Its totient is φ = 74879078400.

The previous prime is 231332653469. The next prime is 231332653529. The reversal of 231332653512 is 215356233132.

231332653512 is a `hidden beast` number, since 2 + 3 + 133 + 2 + 6 + 5 + 3 + 512 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 263776818 + ... + 263777694.

It is an arithmetic number, because the mean of its divisors is an integer number (2584250325).

Almost surely, 2^231332653512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231332653512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330784041600).

231332653512 is an abundant number, since it is smaller than the sum of its proper divisors (430235429688).

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

231332653512 is a wasteful number, since it uses less digits than its factorization.

231332653512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213 (or 1203 counting only the distinct ones).

The product of its digits is 97200, while the sum is 36.

Adding to 231332653512 its reverse (215356233132), we get a palindrome (446688886644).

The spelling of 231332653512 in words is "two hundred thirty-one billion, three hundred thirty-two million, six hundred fifty-three thousand, five hundred twelve".