23652221 has 2 divisors, whose sum is σ = 23652222. Its totient is φ = 23652220.

The previous prime is 23652217. The next prime is 23652227. The reversal of 23652221 is 12225632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13980121 + 9672100 = 3739^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 23652221 - 2² = 23652217 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (23652227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11826110 + 11826111.

It is an arithmetic number, because the mean of its divisors is an integer number (11826111).

Almost surely, 2^23652221 is an apocalyptic number.

It is an amenable number.

23652221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23652221 is an equidigital number, since it uses as much as digits as its factorization.

23652221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 23652221 is about 4863.3549119923. The cubic root of 23652221 is about 287.0498401952.

Adding to 23652221 its reverse (12225632), we get a palindrome (35877853).

The spelling of 23652221 in words is "twenty-three million, six hundred fifty-two thousand, two hundred twenty-one".