231532501542540 has 96 divisors (see below), whose sum is σ = 730040309913600. Its totient is φ = 54318475430400.

The previous prime is 231532501542467. The next prime is 231532501542541. The reversal of 231532501542540 is 45245105235132.

It is a junction number, because it is equal to n+sod(n) for n = 231532501542492 and 231532501542501.

It is not an unprimeable number, because it can be changed into a prime (231532501542541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5658154065 + ... + 5658194984.

It is an arithmetic number, because the mean of its divisors is an integer number (7604586561600).

Almost surely, 2^{231532501542540} is an apocalyptic number.

231532501542540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231532501542540 is an abundant number, since it is smaller than the sum of its proper divisors (498507808371060).

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

231532501542540 is a wasteful number, since it uses less digits than its factorization.

231532501542540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11316349103 (or 11316349101 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 42.

Adding to 231532501542540 its reverse (45245105235132), we get a palindrome (276777606777672).

The spelling of 231532501542540 in words is "two hundred thirty-one trillion, five hundred thirty-two billion, five hundred one million, five hundred forty-two thousand, five hundred forty".