213023643 has 16 divisors (see below), whose sum is σ = 329181696. Its totient is φ = 120012480.

The previous prime is 213023641. The next prime is 213023663. The reversal of 213023643 is 346320312.

It is not a de Polignac number, because 213023643 - 2¹ = 213023641 is a prime.

213023643 is a modest number, since divided by 23643 gives 213 as remainder.

It is not an unprimeable number, because it can be changed into a prime (213023641) 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 15 ways as a sum of consecutive naturals, for example, 69946 + ... + 72927.

It is an arithmetic number, because the mean of its divisors is an integer number (20573856).

Almost surely, 2^213023643 is an apocalyptic number.

213023643 is a deficient number, since it is larger than the sum of its proper divisors (116158053).

213023643 is a wasteful number, since it uses less digits than its factorization.

213023643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142954.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 213023643 is about 14595.3294926836. The cubic root of 213023643 is about 597.2313579078.

Adding to 213023643 its reverse (346320312), we get a palindrome (559343955).

The spelling of 213023643 in words is "two hundred thirteen million, twenty-three thousand, six hundred forty-three".