13431403231 has 16 divisors (see below), whose sum is σ = 14388391584. Its totient is φ = 12493522944.

The previous prime is 13431403229. The next prime is 13431403267. The reversal of 13431403231 is 13230413431.

It is a cyclic number.

It is not a de Polignac number, because 13431403231 - 2¹ = 13431403229 is a prime.

It is a super-2 number, since 2×13431403231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13431403196 and 13431403205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13431401231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 779101 + ... + 796153.

It is an arithmetic number, because the mean of its divisors is an integer number (899274474).

Almost surely, 2^13431403231 is an apocalyptic number.

13431403231 is a deficient number, since it is larger than the sum of its proper divisors (956988353).

13431403231 is a wasteful number, since it uses less digits than its factorization.

13431403231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17610.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 13431403231 its reverse (13230413431), we get a palindrome (26661816662).

The spelling of 13431403231 in words is "thirteen billion, four hundred thirty-one million, four hundred three thousand, two hundred thirty-one".