11321599 has 4 divisors (see below), whose sum is σ = 11584936. Its totient is φ = 11058264.

The previous prime is 11321591. The next prime is 11321659. The reversal of 11321599 is 99512311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99512311 = 29 ⋅3431459.

It is a cyclic number.

It is not a de Polignac number, because 11321599 - 2³ = 11321591 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11321599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321591) 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, 131604 + ... + 131689.

It is an arithmetic number, because the mean of its divisors is an integer number (2896234).

Almost surely, 2^11321599 is an apocalyptic number.

11321599 is a deficient number, since it is larger than the sum of its proper divisors (263337).

11321599 is an equidigital number, since it uses as much as digits as its factorization.

11321599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263336.

The product of its digits is 2430, while the sum is 31.

The square root of 11321599 is about 3364.7583865710. The cubic root of 11321599 is about 224.5445866572.

It can be divided in two parts, 113 and 21599, that added together give a palindrome (21712).

The spelling of 11321599 in words is "eleven million, three hundred twenty-one thousand, five hundred ninety-nine".