13431323321 has 8 divisors (see below), whose sum is σ = 14465944584. Its totient is φ = 12396908160.

The previous prime is 13431323309. The next prime is 13431323327. The reversal of 13431323321 is 12332313431.

It can be written as a sum of positive squares in 4 ways, for example, as 1057875625 + 12373447696 = 32525^2 + 111236^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-13431323321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13431323327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100451 + ... + 192231.

It is an arithmetic number, because the mean of its divisors is an integer number (1808243073).

Almost surely, 2^13431323321 is an apocalyptic number.

It is an amenable number.

13431323321 is a deficient number, since it is larger than the sum of its proper divisors (1034621263).

13431323321 is a wasteful number, since it uses less digits than its factorization.

13431323321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103051.

The product of its digits is 3888, while the sum is 26.

Adding to 13431323321 its reverse (12332313431), we get a palindrome (25763636752).

The spelling of 13431323321 in words is "thirteen billion, four hundred thirty-one million, three hundred twenty-three thousand, three hundred twenty-one".