23212311 has 8 divisors (see below), whose sum is σ = 31474560. Its totient is φ = 15212472.

The previous prime is 23212297. The next prime is 23212331. The reversal of 23212311 is 11321232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23212311 - 2⁶ = 23212247 is a prime.

It is a super-2 number, since 2×23212311² = 1077622763921442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23212331) 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 in 7 ways as a sum of consecutive naturals, for example, 65395 + ... + 65748.

It is an arithmetic number, because the mean of its divisors is an integer number (3934320).

Almost surely, 2^23212311 is an apocalyptic number.

23212311 is a deficient number, since it is larger than the sum of its proper divisors (8262249).

23212311 is a wasteful number, since it uses less digits than its factorization.

23212311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131205.

The product of its digits is 72, while the sum is 15.

The square root of 23212311 is about 4817.9156281529. The cubic root of 23212311 is about 285.2590688329.

Adding to 23212311 its reverse (11321232), we get a palindrome (34533543).

It can be divided in two parts, 2321231 and 1, that added together give a palindrome (2321232).

The spelling of 23212311 in words is "twenty-three million, two hundred twelve thousand, three hundred eleven".