14238531991 has 16 divisors (see below), whose sum is σ = 14640030720. Its totient is φ = 13842485280.

The previous prime is 14238531949. The next prime is 14238532013. The reversal of 14238531991 is 19913583241.

14238531991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 14238531991 - 2⁹ = 14238531479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14238531091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3099106 + ... + 3103696.

It is an arithmetic number, because the mean of its divisors is an integer number (915001920).

Almost surely, 2^14238531991 is an apocalyptic number.

14238531991 is a deficient number, since it is larger than the sum of its proper divisors (401498729).

14238531991 is a wasteful number, since it uses less digits than its factorization.

14238531991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5166.

The product of its digits is 233280, while the sum is 46.

The spelling of 14238531991 in words is "fourteen billion, two hundred thirty-eight million, five hundred thirty-one thousand, nine hundred ninety-one".