23345551 has 4 divisors (see below), whose sum is σ = 24150600. Its totient is φ = 22540504.

The previous prime is 23345513. The next prime is 23345563. The reversal of 23345551 is 15554332.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23345551 - 2¹¹ = 23343503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23345591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402481 + ... + 402538.

It is an arithmetic number, because the mean of its divisors is an integer number (6037650).

Almost surely, 2^23345551 is an apocalyptic number.

23345551 is a deficient number, since it is larger than the sum of its proper divisors (805049).

23345551 is an equidigital number, since it uses as much as digits as its factorization.

23345551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805048.

The product of its digits is 9000, while the sum is 28.

The square root of 23345551 is about 4831.7233985401. The cubic root of 23345551 is about 285.8038289936.

Adding to 23345551 its reverse (15554332), we get a palindrome (38899883).

The spelling of 23345551 in words is "twenty-three million, three hundred forty-five thousand, five hundred fifty-one".