231531533110240 has 48 divisors (see below), whose sum is σ = 596719905793200. Its totient is φ = 84193284766720.

The previous prime is 231531533110081. The next prime is 231531533110247. The reversal of 231531533110240 is 42011335135132.

It is a super-2 number, since 2×231531533110240² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231531533110196 and 231531533110205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231531533110247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65776001965 + ... + 65776005484.

It is an arithmetic number, because the mean of its divisors is an integer number (12431664704025).

Almost surely, 2^{231531533110240} is an apocalyptic number.

231531533110240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231531533110240 is an abundant number, since it is smaller than the sum of its proper divisors (365188372682960).

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

231531533110240 is a wasteful number, since it uses less digits than its factorization.

231531533110240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131552007475 (or 131552007467 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

Adding to 231531533110240 its reverse (42011335135132), we get a palindrome (273542868245372).

The spelling of 231531533110240 in words is "two hundred thirty-one trillion, five hundred thirty-one billion, five hundred thirty-three million, one hundred ten thousand, two hundred forty".