23613221 has 16 divisors (see below), whose sum is σ = 26101440. Its totient is φ = 21262080.

The previous prime is 23613217. The next prime is 23613259. The reversal of 23613221 is 12231632.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 23613221 - 2² = 23613217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23613193 and 23613202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23613281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103910 + ... + 104136.

It is an arithmetic number, because the mean of its divisors is an integer number (1631340).

Almost surely, 2^23613221 is an apocalyptic number.

It is an amenable number.

23613221 is a deficient number, since it is larger than the sum of its proper divisors (2488219).

23613221 is a wasteful number, since it uses less digits than its factorization.

23613221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484.

The product of its digits is 432, while the sum is 20.

The square root of 23613221 is about 4859.3436799634. The cubic root of 23613221 is about 286.8919818345.

Adding to 23613221 its reverse (12231632), we get a palindrome (35844853).

The spelling of 23613221 in words is "twenty-three million, six hundred thirteen thousand, two hundred twenty-one".