231543344525 has 6 divisors (see below), whose sum is σ = 287113747242. Its totient is φ = 185234675600.

The previous prime is 231543344509. The next prime is 231543344587. The reversal of 231543344525 is 525443345132.

It can be written as a sum of positive squares in 3 ways, for example, as 32330197636 + 199213146889 = 179806^2 + 446333^2 .

It is not a de Polignac number, because 231543344525 - 2⁴ = 231543344509 is a prime.

It is a super-2 number, since 2×231543344525² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4630866866 + ... + 4630866915.

It is an arithmetic number, because the mean of its divisors is an integer number (47852291207).

Almost surely, 2^231543344525 is an apocalyptic number.

231543344525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231543344525 is a deficient number, since it is larger than the sum of its proper divisors (55570402717).

231543344525 is an equidigital number, since it uses as much as digits as its factorization.

231543344525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9261733791 (or 9261733786 counting only the distinct ones).

The product of its digits is 864000, while the sum is 41.

Adding to 231543344525 its reverse (525443345132), we get a palindrome (756986689657).

The spelling of 231543344525 in words is "two hundred thirty-one billion, five hundred forty-three million, three hundred forty-four thousand, five hundred twenty-five".