213334643 has 4 divisors (see below), whose sum is σ = 220691040. Its totient is φ = 205978248.

The previous prime is 213334613. The next prime is 213334657. The reversal of 213334643 is 346433312.

It is a happy number.

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 213334643 - 2²² = 209140339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 7356367 = 213334643 / (2 + 1 + 3 + 3 + 3 + 4 + 6 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213334613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3678155 + ... + 3678212.

It is an arithmetic number, because the mean of its divisors is an integer number (55172760).

Almost surely, 2^213334643 is an apocalyptic number.

213334643 is a deficient number, since it is larger than the sum of its proper divisors (7356397).

213334643 is an equidigital number, since it uses as much as digits as its factorization.

213334643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7356396.

The product of its digits is 15552, while the sum is 29.

The square root of 213334643 is about 14605.9797001091. The cubic root of 213334643 is about 597.5218556106.

Adding to 213334643 its reverse (346433312), we get a palindrome (559767955).

The spelling of 213334643 in words is "two hundred thirteen million, three hundred thirty-four thousand, six hundred forty-three".