231544806012 has 144 divisors (see below), whose sum is σ = 664379442272. Its totient is φ = 70076378880.

The previous prime is 231544805981. The next prime is 231544806037. The reversal of 231544806012 is 210608445132.

It is a happy number.

231544806012 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 4 + 48 + 0 + 601 + 2 = 666.

It is a super-2 number, since 2×231544806012² (a number of 24 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 620598 + ... + 920994.

Almost surely, 2^231544806012 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 231544806012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332189721136).

231544806012 is an abundant number, since it is smaller than the sum of its proper divisors (432834636260).

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

231544806012 is a wasteful number, since it uses less digits than its factorization.

231544806012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300490 (or 300476 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 231544806012 in words is "two hundred thirty-one billion, five hundred forty-four million, eight hundred six thousand, twelve".