23218263 has 6 divisors (see below), whose sum is σ = 33537504. Its totient is φ = 15478836.

The previous prime is 23218249. The next prime is 23218297. The reversal of 23218263 is 36281232.

It is not a de Polignac number, because 23218263 - 2¹² = 23214167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23218463) 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 5 ways as a sum of consecutive naturals, for example, 1289895 + ... + 1289912.

It is an arithmetic number, because the mean of its divisors is an integer number (5589584).

Almost surely, 2^23218263 is an apocalyptic number.

23218263 is a deficient number, since it is larger than the sum of its proper divisors (10319241).

23218263 is a wasteful number, since it uses less digits than its factorization.

23218263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579813 (or 2579810 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 23218263 is about 4818.5332830645. The cubic root of 23218263 is about 285.2834483799.

Adding to 23218263 its reverse (36281232), we get a palindrome (59499495).

The spelling of 23218263 in words is "twenty-three million, two hundred eighteen thousand, two hundred sixty-three".