11523321 has 12 divisors (see below), whose sum is σ = 16693248. Its totient is φ = 7659864.

The previous prime is 11523307. The next prime is 11523359. The reversal of 11523321 is 12332511.

It is not a de Polignac number, because 11523321 - 2¹¹ = 11521273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11523294 and 11523303.

It is not an unprimeable number, because it can be changed into a prime (11523301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1776 + ... + 5118.

It is an arithmetic number, because the mean of its divisors is an integer number (1391104).

Almost surely, 2^11523321 is an apocalyptic number.

It is an amenable number.

11523321 is a deficient number, since it is larger than the sum of its proper divisors (5169927).

11523321 is a wasteful number, since it uses less digits than its factorization.

11523321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732 (or 3729 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 11523321 is about 3394.6017439458. The cubic root of 11523321 is about 225.8703474897.

Adding to 11523321 its reverse (12332511), we get a palindrome (23855832).

It can be divided in two parts, 115 and 23321, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 11523321 in words is "eleven million, five hundred twenty-three thousand, three hundred twenty-one".