231131224956 has 24 divisors (see below), whose sum is σ = 539347019904. Its totient is φ = 77037909040.

The previous prime is 231131224861. The next prime is 231131224957. The reversal of 231131224956 is 659422131132.

231131224956 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231131224956² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231131224957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562440 + ... + 882383.

It is an arithmetic number, because the mean of its divisors is an integer number (22472792496).

Almost surely, 2^231131224956 is an apocalyptic number.

It is an amenable number.

231131224956 is an abundant number, since it is smaller than the sum of its proper divisors (308215794948).

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

231131224956 is a wasteful number, since it uses less digits than its factorization.

231131224956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458161 (or 1458159 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The spelling of 231131224956 in words is "two hundred thirty-one billion, one hundred thirty-one million, two hundred twenty-four thousand, nine hundred fifty-six".