11320431 has 4 divisors (see below), whose sum is σ = 15093912. Its totient is φ = 7546952.

The previous prime is 11320427. The next prime is 11320433. The reversal of 11320431 is 13402311.

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 11320431 - 2² = 11320427 is a prime.

It is a super-2 number, since 2×11320431² = 256304316051522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11320431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11320433) 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, 1886736 + ... + 1886741.

It is an arithmetic number, because the mean of its divisors is an integer number (3773478).

Almost surely, 2^11320431 is an apocalyptic number.

11320431 is a deficient number, since it is larger than the sum of its proper divisors (3773481).

11320431 is an equidigital number, since it uses as much as digits as its factorization.

11320431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3773480.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 11320431 is about 3364.5848183691. The cubic root of 11320431 is about 224.5368646297.

Adding to 11320431 its reverse (13402311), we get a palindrome (24722742).

The spelling of 11320431 in words is "eleven million, three hundred twenty thousand, four hundred thirty-one".