213242303 has 4 divisors (see below), whose sum is σ = 213314640. Its totient is φ = 213169968.

The previous prime is 213242291. The next prime is 213242329. The reversal of 213242303 is 303242312.

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 213242303 - 2²⁰ = 212193727 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 (213242363) 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, 31550 + ... + 37707.

It is an arithmetic number, because the mean of its divisors is an integer number (53328660).

Almost surely, 2^213242303 is an apocalyptic number.

213242303 is a deficient number, since it is larger than the sum of its proper divisors (72337).

213242303 is an equidigital number, since it uses as much as digits as its factorization.

213242303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72336.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 213242303 is about 14602.8183238716. The cubic root of 213242303 is about 597.4356324981.

Adding to 213242303 its reverse (303242312), we get a palindrome (516484615).

Subtracting 213242303 from its reverse (303242312), we obtain a palindrome (90000009).

The spelling of 213242303 in words is "two hundred thirteen million, two hundred forty-two thousand, three hundred three".