231551345521032 has 16 divisors (see below), whose sum is σ = 578878363802640. Its totient is φ = 77183781840336.

The previous prime is 231551345520973. The next prime is 231551345521037. The reversal of 231551345521032 is 230125543155132.

It is a super-2 number, since 2×231551345521032² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231551345521037) 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 3 ways as a sum of consecutive naturals, for example, 4823986364998 + ... + 4823986365045.

It is an arithmetic number, because the mean of its divisors is an integer number (36179897737665).

Almost surely, 2^{231551345521032} is an apocalyptic number.

It is an amenable number.

231551345521032 is an abundant number, since it is smaller than the sum of its proper divisors (347327018281608).

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

231551345521032 is a wasteful number, since it uses less digits than its factorization.

231551345521032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9647972730052 (or 9647972730048 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 42.

Adding to 231551345521032 its reverse (230125543155132), we get a palindrome (461676888676164).

The spelling of 231551345521032 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, three hundred forty-five million, five hundred twenty-one thousand, thirty-two".