13213503431 has 4 divisors (see below), whose sum is σ = 13908951000. Its totient is φ = 12518055864.

The previous prime is 13213503409. The next prime is 13213503449. The reversal of 13213503431 is 13430531231.

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 13213503431 - 2¹⁴ = 13213487047 is a prime.

It is a super-2 number, since 2×13213503431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13213503431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213503451) 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, 347723756 + ... + 347723793.

It is an arithmetic number, because the mean of its divisors is an integer number (3477237750).

Almost surely, 2^13213503431 is an apocalyptic number.

13213503431 is a deficient number, since it is larger than the sum of its proper divisors (695447569).

13213503431 is an equidigital number, since it uses as much as digits as its factorization.

13213503431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695447568.

The product of its (nonzero) digits is 3240, while the sum is 26.

The spelling of 13213503431 in words is "thirteen billion, two hundred thirteen million, five hundred three thousand, four hundred thirty-one".