23153321 has 2 divisors, whose sum is σ = 23153322. Its totient is φ = 23153320.

The previous prime is 23153297. The next prime is 23153323. The reversal of 23153321 is 12335132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18826921 + 4326400 = 4339^2 + 2080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23153321 is a prime.

It is a Sophie Germain prime.

Together with 23153323, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23153293 and 23153302.

It is not a weakly prime, because it can be changed into another prime (23153323) 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 as a sum of consecutive naturals, namely, 11576660 + 11576661.

It is an arithmetic number, because the mean of its divisors is an integer number (11576661).

Almost surely, 2^23153321 is an apocalyptic number.

It is an amenable number.

23153321 is a deficient number, since it is larger than the sum of its proper divisors (1).

23153321 is an equidigital number, since it uses as much as digits as its factorization.

23153321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 20.

The square root of 23153321 is about 4811.7897917511. The cubic root of 23153321 is about 285.0172186170.

Adding to 23153321 its reverse (12335132), we get a palindrome (35488453).

The spelling of 23153321 in words is "twenty-three million, one hundred fifty-three thousand, three hundred twenty-one".