231532534543550 has 24 divisors (see below), whose sum is σ = 430650953996016. Its totient is φ = 92612919248640.

The previous prime is 231532534543537. The next prime is 231532534543553. The reversal of 231532534543550 is 55345435235132.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231532534543553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67577927 + ... + 70921373.

It is an arithmetic number, because the mean of its divisors is an integer number (17943789749834).

Almost surely, 2^{231532534543550} is an apocalyptic number.

231532534543550 is a deficient number, since it is larger than the sum of its proper divisors (199118419452466).

231532534543550 is a wasteful number, since it uses less digits than its factorization.

231532534543550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4728452 (or 4728447 counting only the distinct ones).

The product of its (nonzero) digits is 16200000, while the sum is 50.

Adding to 231532534543550 its reverse (55345435235132), we get a palindrome (286877969778682).

The spelling of 231532534543550 in words is "two hundred thirty-one trillion, five hundred thirty-two billion, five hundred thirty-four million, five hundred forty-three thousand, five hundred fifty".