23227921 has 2 divisors, whose sum is σ = 23227922. Its totient is φ = 23227920.

The previous prime is 23227909. The next prime is 23227931. The reversal of 23227921 is 12972232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13242321 + 9985600 = 3639^2 + 3160^2 .

It is a cyclic number.

It is not a de Polignac number, because 23227921 - 2⁵ = 23227889 is a prime.

It is a Chen prime.

It is equal to p_1461655 and since 23227921 and 1461655 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23227921.

It is not a weakly prime, because it can be changed into another prime (23227901) 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 as a sum of consecutive naturals, namely, 11613960 + 11613961.

It is an arithmetic number, because the mean of its divisors is an integer number (11613961).

Almost surely, 2^23227921 is an apocalyptic number.

It is an amenable number.

23227921 is a deficient number, since it is larger than the sum of its proper divisors (1).

23227921 is an equidigital number, since it uses as much as digits as its factorization.

23227921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 23227921 is about 4819.5353510479. The cubic root of 23227921 is about 285.3229989354.

The spelling of 23227921 in words is "twenty-three million, two hundred twenty-seven thousand, nine hundred twenty-one".