23225021 has 2 divisors, whose sum is σ = 23225022. Its totient is φ = 23225020.

The previous prime is 23225017. The next prime is 23225047. The reversal of 23225021 is 12052232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22905796 + 319225 = 4786^2 + 565^2 .

It is a cyclic number.

It is not a de Polignac number, because 23225021 - 2² = 23225017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23225221) 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 as a sum of consecutive naturals, namely, 11612510 + 11612511.

It is an arithmetic number, because the mean of its divisors is an integer number (11612511).

Almost surely, 2^23225021 is an apocalyptic number.

It is an amenable number.

23225021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23225021 is an equidigital number, since it uses as much as digits as its factorization.

23225021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 23225021 is about 4819.2344827784. The cubic root of 23225021 is about 285.3111242734.

Adding to 23225021 its reverse (12052232), we get a palindrome (35277253).

The spelling of 23225021 in words is "twenty-three million, two hundred twenty-five thousand, twenty-one".