23218007 has 4 divisors (see below), whose sum is σ = 23250000. Its totient is φ = 23186016.

The previous prime is 23218001. The next prime is 23218043. The reversal of 23218007 is 70081232.

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 23218007 - 2⁴ = 23217991 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 (23218001) 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, 14882 + ... + 16367.

It is an arithmetic number, because the mean of its divisors is an integer number (5812500).

Almost surely, 2^23218007 is an apocalyptic number.

23218007 is a deficient number, since it is larger than the sum of its proper divisors (31993).

23218007 is an equidigital number, since it uses as much as digits as its factorization.

23218007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31992.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 23218007 is about 4818.5067188912. The cubic root of 23218007 is about 285.2823998830.

Adding to 23218007 its reverse (70081232), we get a palindrome (93299239).

The spelling of 23218007 in words is "twenty-three million, two hundred eighteen thousand, seven".