23212247 has 2 divisors, whose sum is σ = 23212248. Its totient is φ = 23212246.

The previous prime is 23212207. The next prime is 23212249. The reversal of 23212247 is 74221232.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23212247 - 2²⁴ = 6435031 is a prime.

Together with 23212249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23212249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606123 + 11606124.

It is an arithmetic number, because the mean of its divisors is an integer number (11606124).

Almost surely, 2^23212247 is an apocalyptic number.

23212247 is a deficient number, since it is larger than the sum of its proper divisors (1).

23212247 is an equidigital number, since it uses as much as digits as its factorization.

23212247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 23.

The square root of 23212247 is about 4817.9089862719. The cubic root of 23212247 is about 285.2588066646.

Adding to 23212247 its reverse (74221232), we get a palindrome (97433479).

The spelling of 23212247 in words is "twenty-three million, two hundred twelve thousand, two hundred forty-seven".