23213 has 4 divisors (see below), whose sum is σ = 23520. Its totient is φ = 22908.

The previous prime is 23209. The next prime is 23227. The reversal of 23213 is 31232.

23213 is nontrivially palindromic in base 2 and base 8.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23213 - 2² = 23209 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 23194 and 23203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23203) 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, 56 + ... + 222.

It is an arithmetic number, because the mean of its divisors is an integer number (5880).

2²³²¹³ is an apocalyptic number.

It is an amenable number.

23213 is a deficient number, since it is larger than the sum of its proper divisors (307).

23213 is a wasteful number, since it uses less digits than its factorization.

23213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306.

The product of its digits is 36, while the sum is 11.

The square root of 23213 is about 152.3581307315. The cubic root of 23213 is about 28.5261891208.

Adding to 23213 its reverse (31232), we get a palindrome (54445).

The spelling of 23213 in words is "twenty-three thousand, two hundred thirteen".