23113221 has 4 divisors (see below), whose sum is σ = 30817632. Its totient is φ = 15408812.

The previous prime is 23113219. The next prime is 23113241. The reversal of 23113221 is 12231132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23113221 - 2¹ = 23113219 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23113221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23113201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3852201 + ... + 3852206.

It is an arithmetic number, because the mean of its divisors is an integer number (7704408).

Almost surely, 2^23113221 is an apocalyptic number.

It is an amenable number.

23113221 is a deficient number, since it is larger than the sum of its proper divisors (7704411).

23113221 is an equidigital number, since it uses as much as digits as its factorization.

23113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7704410.

The product of its digits is 72, while the sum is 15.

The square root of 23113221 is about 4807.6211373194. The cubic root of 23113221 is about 284.8525799601.

Adding to 23113221 its reverse (12231132), we get a palindrome (35344353).

The spelling of 23113221 in words is "twenty-three million, one hundred thirteen thousand, two hundred twenty-one".