14231535421 has 2 divisors, whose sum is σ = 14231535422. Its totient is φ = 14231535420.

The previous prime is 14231535419. The next prime is 14231535427. The reversal of 14231535421 is 12453513241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12367886521 + 1863648900 = 111211^2 + 43170^2 .

It is a cyclic number.

It is not a de Polignac number, because 14231535421 - 2¹ = 14231535419 is a prime.

Together with 14231535419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14231535427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7115767710 + 7115767711.

It is an arithmetic number, because the mean of its divisors is an integer number (7115767711).

Almost surely, 2^14231535421 is an apocalyptic number.

It is an amenable number.

14231535421 is a deficient number, since it is larger than the sum of its proper divisors (1).

14231535421 is an equidigital number, since it uses as much as digits as its factorization.

14231535421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 31.

The spelling of 14231535421 in words is "fourteen billion, two hundred thirty-one million, five hundred thirty-five thousand, four hundred twenty-one".