213304123 has 4 divisors (see below), whose sum is σ = 218264728. Its totient is φ = 208343520.

The previous prime is 213304121. The next prime is 213304141. The reversal of 213304123 is 321403312.

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

It is a cyclic number.

It is not a de Polignac number, because 213304123 - 2¹ = 213304121 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 213304123.

It is not an unprimeable number, because it can be changed into a prime (213304121) 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, 2480238 + ... + 2480323.

It is an arithmetic number, because the mean of its divisors is an integer number (54566182).

Almost surely, 2^213304123 is an apocalyptic number.

213304123 is a deficient number, since it is larger than the sum of its proper divisors (4960605).

213304123 is an equidigital number, since it uses as much as digits as its factorization.

213304123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4960604.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 213304123 is about 14604.9348851681. The cubic root of 213304123 is about 597.4933601031.

Adding to 213304123 its reverse (321403312), we get a palindrome (534707435).

The spelling of 213304123 in words is "two hundred thirteen million, three hundred four thousand, one hundred twenty-three".