23123213 has 4 divisors (see below), whose sum is σ = 24483420. Its totient is φ = 21763008.

The previous prime is 23123189. The next prime is 23123231. The reversal of 23123213 is 31232132.

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 16957924 + 6165289 = 4118^2 + 2483^2 .

It is a cyclic number.

It is not a de Polignac number, because 23123213 - 2¹⁴ = 23106829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1360189 = 23123213 / (2 + 3 + 1 + 2 + 3 + 2 + 1 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23123191 and 23123200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23123273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680078 + ... + 680111.

It is an arithmetic number, because the mean of its divisors is an integer number (6120855).

Almost surely, 2^23123213 is an apocalyptic number.

It is an amenable number.

23123213 is a deficient number, since it is larger than the sum of its proper divisors (1360207).

23123213 is a wasteful number, since it uses less digits than its factorization.

23123213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360206.

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

The square root of 23123213 is about 4808.6602084156. The cubic root of 23123213 is about 284.8936219381.

Adding to 23123213 its reverse (31232132), we get a palindrome (54355345).

It can be divided in two parts, 2 and 3123213, that multiplied together give a palindrome (6246426).

The spelling of 23123213 in words is "twenty-three million, one hundred twenty-three thousand, two hundred thirteen".