231556444105513 has 16 divisors (see below), whose sum is σ = 233147543428800. Its totient is φ = 229970850278400.

The previous prime is 231556444105489. The next prime is 231556444105531. The reversal of 231556444105513 is 315501444655132.

It is a cyclic number.

It is not a de Polignac number, because 231556444105513 - 2⁹ = 231556444105001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231556444105583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2730221878 + ... + 2730306688.

It is an arithmetic number, because the mean of its divisors is an integer number (14571721464300).

Almost surely, 2^{231556444105513} is an apocalyptic number.

It is an amenable number.

231556444105513 is a deficient number, since it is larger than the sum of its proper divisors (1591099323287).

231556444105513 is a wasteful number, since it uses less digits than its factorization.

231556444105513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117048.

The product of its (nonzero) digits is 4320000, while the sum is 49.

The spelling of 231556444105513 in words is "two hundred thirty-one trillion, five hundred fifty-six billion, four hundred forty-four million, one hundred five thousand, five hundred thirteen".