23213321 has 4 divisors (see below), whose sum is σ = 23236500. Its totient is φ = 23190144.

The previous prime is 23213317. The next prime is 23213341. The reversal of 23213321 is 12331232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21724921 + 1488400 = 4661^2 + 1220^2 .

It is a cyclic number.

It is not a de Polignac number, because 23213321 - 2² = 23213317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23213321.

It is not an unprimeable number, because it can be changed into a prime (23213341) 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, 10016 + ... + 12113.

It is an arithmetic number, because the mean of its divisors is an integer number (5809125).

Almost surely, 2^23213321 is an apocalyptic number.

It is an amenable number.

23213321 is a deficient number, since it is larger than the sum of its proper divisors (23179).

23213321 is a wasteful number, since it uses less digits than its factorization.

23213321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23178.

The product of its digits is 216, while the sum is 17.

The square root of 23213321 is about 4818.0204441243. The cubic root of 23213321 is about 285.2632061128.

Adding to 23213321 its reverse (12331232), we get a palindrome (35544553).

The spelling of 23213321 in words is "twenty-three million, two hundred thirteen thousand, three hundred twenty-one".