213003613 has 4 divisors (see below), whose sum is σ = 213464128. Its totient is φ = 212543100.

The previous prime is 213003599. The next prime is 213003619. The reversal of 213003613 is 316300312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213003613 - 2²¹ = 210906461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213003619) 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, 229563 + ... + 230488.

It is an arithmetic number, because the mean of its divisors is an integer number (53366032).

Almost surely, 2^213003613 is an apocalyptic number.

It is an amenable number.

213003613 is a deficient number, since it is larger than the sum of its proper divisors (460515).

213003613 is an equidigital number, since it uses as much as digits as its factorization.

213003613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460514.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 213003613 is about 14594.6432981420. The cubic root of 213003613 is about 597.2126386726.

Adding to 213003613 its reverse (316300312), we get a palindrome (529303925).

The spelling of 213003613 in words is "two hundred thirteen million, three thousand, six hundred thirteen".