213210043 has 4 divisors (see below), whose sum is σ = 217232928. Its totient is φ = 209187160.

The previous prime is 213210017. The next prime is 213210047. The reversal of 213210043 is 340012312.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213210043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213209999 and 213210026.

It is not an unprimeable number, because it can be changed into a prime (213210047) 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, 2011363 + ... + 2011468.

It is an arithmetic number, because the mean of its divisors is an integer number (54308232).

Almost surely, 2^213210043 is an apocalyptic number.

213210043 is a deficient number, since it is larger than the sum of its proper divisors (4022885).

213210043 is an equidigital number, since it uses as much as digits as its factorization.

213210043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022884.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 213210043 is about 14601.7137007955. The cubic root of 213210043 is about 597.4055036334.

Adding to 213210043 its reverse (340012312), we get a palindrome (553222355).

The spelling of 213210043 in words is "two hundred thirteen million, two hundred ten thousand, forty-three".