213004003 has 4 divisors (see below), whose sum is σ = 224214760. Its totient is φ = 201793248.

The previous prime is 213003997. The next prime is 213004031. The reversal of 213004003 is 300400312.

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 213004003 - 2⁵ = 213003971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213004063) 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, 5605350 + ... + 5605387.

It is an arithmetic number, because the mean of its divisors is an integer number (56053690).

Almost surely, 2^213004003 is an apocalyptic number.

213004003 is a deficient number, since it is larger than the sum of its proper divisors (11210757).

213004003 is a wasteful number, since it uses less digits than its factorization.

213004003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11210756.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 213004003 is about 14594.6566592024. The cubic root of 213004003 is about 597.2130031621.

Adding to 213004003 its reverse (300400312), we get a palindrome (513404315).

The spelling of 213004003 in words is "two hundred thirteen million, four thousand, three".