13431203999 has 4 divisors (see below), whose sum is σ = 13479002160. Its totient is φ = 13383405840.

The previous prime is 13431203971. The next prime is 13431204001. The reversal of 13431203999 is 99930213431.

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

It is a cyclic number.

It is not a de Polignac number, because 13431203999 - 2²⁸ = 13162768543 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 (13431203299) 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, 23898659 + ... + 23899220.

It is an arithmetic number, because the mean of its divisors is an integer number (3369750540).

Almost surely, 2^13431203999 is an apocalyptic number.

13431203999 is a deficient number, since it is larger than the sum of its proper divisors (47798161).

13431203999 is an equidigital number, since it uses as much as digits as its factorization.

13431203999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47798160.

The product of its (nonzero) digits is 157464, while the sum is 44.

The spelling of 13431203999 in words is "thirteen billion, four hundred thirty-one million, two hundred three thousand, nine hundred ninety-nine".