23421311 has 2 divisors, whose sum is σ = 23421312. Its totient is φ = 23421310.

The previous prime is 23421287. The next prime is 23421313. The reversal of 23421311 is 11312432.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23421311 - 2¹⁸ = 23159167 is a prime.

Together with 23421313, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23421311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23421313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11710655 + 11710656.

It is an arithmetic number, because the mean of its divisors is an integer number (11710656).

Almost surely, 2^23421311 is an apocalyptic number.

23421311 is a deficient number, since it is larger than the sum of its proper divisors (1).

23421311 is an equidigital number, since it uses as much as digits as its factorization.

23421311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 17.

The square root of 23421311 is about 4839.5569012049. The cubic root of 23421311 is about 286.1126546923.

Adding to 23421311 its reverse (11312432), we get a palindrome (34733743).

It can be divided in two parts, 23421 and 311, that added together give a palindrome (23732).

The spelling of 23421311 in words is "twenty-three million, four hundred twenty-one thousand, three hundred eleven".