213123323 has 16 divisors (see below), whose sum is σ = 256800000. Its totient is φ = 172785312.

The previous prime is 213123319. The next prime is 213123331. The reversal of 213123323 is 323321312.

It is not a de Polignac number, because 213123323 - 2² = 213123319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213123295 and 213123304.

It is not an unprimeable number, because it can be changed into a prime (213123223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141428 + ... + 142926.

It is an arithmetic number, because the mean of its divisors is an integer number (16050000).

Almost surely, 2^213123323 is an apocalyptic number.

213123323 is a deficient number, since it is larger than the sum of its proper divisors (43676677).

213123323 is a wasteful number, since it uses less digits than its factorization.

213123323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594.

The product of its digits is 648, while the sum is 20.

The square root of 213123323 is about 14598.7438843210. The cubic root of 213123323 is about 597.3244973950.

Adding to 213123323 its reverse (323321312), we get a palindrome (536444635).

The spelling of 213123323 in words is "two hundred thirteen million, one hundred twenty-three thousand, three hundred twenty-three".