213123230 has 8 divisors (see below), whose sum is σ = 383621832. Its totient is φ = 85249288.

The previous prime is 213123223. The next prime is 213123241. The reversal of 213123230 is 32321312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×213123230² = 90843022331265800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213123199 and 213123208.

It is a congruent number.

It is an unprimeable number.

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, 10656152 + ... + 10656171.

It is an arithmetic number, because the mean of its divisors is an integer number (47952729).

Almost surely, 2^213123230 is an apocalyptic number.

213123230 is a deficient number, since it is larger than the sum of its proper divisors (170498602).

213123230 is a wasteful number, since it uses less digits than its factorization.

213123230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21312330.

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

The square root of 213123230 is about 14598.7406991151. The cubic root of 213123230 is about 597.3244105107.

Adding to 213123230 its reverse (32321312), we get a palindrome (245444542).

It can be divided in two parts, 21312 and 3230, that added together give a palindrome (24542).

The spelling of 213123230 in words is "two hundred thirteen million, one hundred twenty-three thousand, two hundred thirty".