14431131313421 has 4 divisors (see below), whose sum is σ = 14464459561692. Its totient is φ = 14397803065152.

The previous prime is 14431131313411. The next prime is 14431131313441. The reversal of 14431131313421 is 12431313113441.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3786083157796 + 10645048155625 = 1945786^2 + 3262675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14431131313421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14431131313411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16664123486 + ... + 16664124351.

It is an arithmetic number, because the mean of its divisors is an integer number (3616114890423).

Almost surely, 2^{14431131313421} is an apocalyptic number.

It is an amenable number.

14431131313421 is a deficient number, since it is larger than the sum of its proper divisors (33328248271).

14431131313421 is an equidigital number, since it uses as much as digits as its factorization.

14431131313421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33328248270.

The product of its digits is 10368, while the sum is 32.

Adding to 14431131313421 its reverse (12431313113441), we get a palindrome (26862444426862).

The spelling of 14431131313421 in words is "fourteen trillion, four hundred thirty-one billion, one hundred thirty-one million, three hundred thirteen thousand, four hundred twenty-one".