23610221 has 2 divisors, whose sum is σ = 23610222. Its totient is φ = 23610220.

The previous prime is 23610203. The next prime is 23610239. The reversal of 23610221 is 12201632.

It is a balanced prime because it is at equal distance from previous prime (23610203) and next prime (23610239).

It can be written as a sum of positive squares in only one way, i.e., 12145225 + 11464996 = 3485^2 + 3386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23610221 is a prime.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 23610221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23610241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11805110 + 11805111.

It is an arithmetic number, because the mean of its divisors is an integer number (11805111).

Almost surely, 2^23610221 is an apocalyptic number.

It is an amenable number.

23610221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23610221 is an equidigital number, since it uses as much as digits as its factorization.

23610221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 23610221 is about 4859.0349864968. The cubic root of 23610221 is about 286.8798316864.

Adding to 23610221 its reverse (12201632), we get a palindrome (35811853).

The spelling of 23610221 in words is "twenty-three million, six hundred ten thousand, two hundred twenty-one".