213210433 has 4 divisors (see below), whose sum is σ = 216705748. Its totient is φ = 209715120.

The previous prime is 213210427. The next prime is 213210449. The reversal of 213210433 is 334012312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4032064 + 209178369 = 2008^2 + 14463^2 .

It is a cyclic number.

It is not a de Polignac number, because 213210433 - 2⁵ = 213210401 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 213210433.

It is not an unprimeable number, because it can be changed into a prime (213210463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1747566 + ... + 1747687.

It is an arithmetic number, because the mean of its divisors is an integer number (54176437).

Almost surely, 2^213210433 is an apocalyptic number.

It is an amenable number.

213210433 is a deficient number, since it is larger than the sum of its proper divisors (3495315).

213210433 is an equidigital number, since it uses as much as digits as its factorization.

213210433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3495314.

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

The square root of 213210433 is about 14601.7270553863. The cubic root of 213210433 is about 597.4058678877.

Adding to 213210433 its reverse (334012312), we get a palindrome (547222745).

The spelling of 213210433 in words is "two hundred thirteen million, two hundred ten thousand, four hundred thirty-three".