14231538421 has 4 divisors (see below), whose sum is σ = 14372444844. Its totient is φ = 14090632000.

The previous prime is 14231538371. The next prime is 14231538487. The reversal of 14231538421 is 12483513241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12483513241 = 101 ⋅123599141.

It can be written as a sum of positive squares in 2 ways, for example, as 6090085521 + 8141452900 = 78039^2 + 90230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14231538421 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 (14231538221) 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, 70453060 + ... + 70453261.

It is an arithmetic number, because the mean of its divisors is an integer number (3593111211).

Almost surely, 2^14231538421 is an apocalyptic number.

It is an amenable number.

14231538421 is a deficient number, since it is larger than the sum of its proper divisors (140906423).

14231538421 is a wasteful number, since it uses less digits than its factorization.

14231538421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140906422.

The product of its digits is 23040, while the sum is 34.

The spelling of 14231538421 in words is "fourteen billion, two hundred thirty-one million, five hundred thirty-eight thousand, four hundred twenty-one".