11321431 has 8 divisors (see below), whose sum is σ = 12426624. Its totient is φ = 10228920.

The previous prime is 11321399. The next prime is 11321437. The reversal of 11321431 is 13412311.

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

It is a cyclic number.

It is not a de Polignac number, because 11321431 - 2⁵ = 11321399 is a prime.

It is a super-2 number, since 2×11321431² = 256349599775522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1245 + ... + 4918.

It is an arithmetic number, because the mean of its divisors is an integer number (1553328).

Almost surely, 2^11321431 is an apocalyptic number.

11321431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11321431 is a deficient number, since it is larger than the sum of its proper divisors (1105193).

11321431 is a wasteful number, since it uses less digits than its factorization.

11321431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6341.

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

The square root of 11321431 is about 3364.7334218330. The cubic root of 11321431 is about 224.5434759873.

Adding to 11321431 its reverse (13412311), we get a palindrome (24733742).

The spelling of 11321431 in words is "eleven million, three hundred twenty-one thousand, four hundred thirty-one".