11431321 has 8 divisors (see below), whose sum is σ = 12544704. Its totient is φ = 10330320.

The previous prime is 11431297. The next prime is 11431349. The reversal of 11431321 is 12313411.

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

It is not a de Polignac number, because 11431321 - 2¹¹ = 11429273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11431295 and 11431304.

It is not an unprimeable number, because it can be changed into a prime (11431921) 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, 1101 + ... + 4906.

It is an arithmetic number, because the mean of its divisors is an integer number (1568088).

Almost surely, 2^11431321 is an apocalyptic number.

11431321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11431321 is a deficient number, since it is larger than the sum of its proper divisors (1113383).

11431321 is a wasteful number, since it uses less digits than its factorization.

11431321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6191.

The product of its digits is 72, while the sum is 16.

The square root of 11431321 is about 3381.0236615558. The cubic root of 11431321 is about 225.2676387177.

Adding to 11431321 its reverse (12313411), we get a palindrome (23744732).

The spelling of 11431321 in words is "eleven million, four hundred thirty-one thousand, three hundred twenty-one".