213134223 has 4 divisors (see below), whose sum is σ = 284178968. Its totient is φ = 142089480.

The previous prime is 213134189. The next prime is 213134227. The reversal of 213134223 is 322431312.

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

It is a de Polignac number, because none of the positive numbers 2^k-213134223 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 213134223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213134227) 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, 35522368 + ... + 35522373.

It is an arithmetic number, because the mean of its divisors is an integer number (71044742).

Almost surely, 2^213134223 is an apocalyptic number.

213134223 is a deficient number, since it is larger than the sum of its proper divisors (71044745).

213134223 is an equidigital number, since it uses as much as digits as its factorization.

213134223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71044744.

The product of its digits is 864, while the sum is 21.

The square root of 213134223 is about 14599.1171993378. The cubic root of 213134223 is about 597.3346804288.

Adding to 213134223 its reverse (322431312), we get a palindrome (535565535).

The spelling of 213134223 in words is "two hundred thirteen million, one hundred thirty-four thousand, two hundred twenty-three".