23311321 has 4 divisors (see below), whose sum is σ = 25430544. Its totient is φ = 21192100.

The previous prime is 23311307. The next prime is 23311357. The reversal of 23311321 is 12311332.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23311321 - 2⁷ = 23311193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23311295 and 23311304.

It is not an unprimeable number, because it can be changed into a prime (23311021) 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, 1059595 + ... + 1059616.

It is an arithmetic number, because the mean of its divisors is an integer number (6357636).

Almost surely, 2^23311321 is an apocalyptic number.

It is an amenable number.

23311321 is a deficient number, since it is larger than the sum of its proper divisors (2119223).

23311321 is a wasteful number, since it uses less digits than its factorization.

23311321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119222.

The product of its digits is 108, while the sum is 16.

The square root of 23311321 is about 4828.1798848013. The cubic root of 23311321 is about 285.6640757364.

Adding to 23311321 its reverse (12311332), we get a palindrome (35622653).

It can be divided in two parts, 23311 and 321, that added together give a palindrome (23632).

The spelling of 23311321 in words is "twenty-three million, three hundred eleven thousand, three hundred twenty-one".