13245421543 has 4 divisors (see below), whose sum is σ = 13431976848. Its totient is φ = 13058866240.

The previous prime is 13245421381. The next prime is 13245421573. The reversal of 13245421543 is 34512454231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34512454231 = 197 ⋅175190123.

It is a cyclic number.

It is not a de Polignac number, because 13245421543 - 2²⁵ = 13211867111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13245421499 and 13245421508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13245421573) 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, 93277546 + ... + 93277687.

It is an arithmetic number, because the mean of its divisors is an integer number (3357994212).

Almost surely, 2^13245421543 is an apocalyptic number.

13245421543 is a deficient number, since it is larger than the sum of its proper divisors (186555305).

13245421543 is an equidigital number, since it uses as much as digits as its factorization.

13245421543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186555304.

The product of its digits is 57600, while the sum is 34.

Adding to 13245421543 its reverse (34512454231), we get a palindrome (47757875774).

The spelling of 13245421543 in words is "thirteen billion, two hundred forty-five million, four hundred twenty-one thousand, five hundred forty-three".