213203311 has 4 divisors (see below), whose sum is σ = 213430824. Its totient is φ = 212975800.

The previous prime is 213203293. The next prime is 213203323. The reversal of 213203311 is 113302312.

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 213203311 - 2¹⁵ = 213170543 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 (213203371) 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, 112345 + ... + 114226.

It is an arithmetic number, because the mean of its divisors is an integer number (53357706).

Almost surely, 2^213203311 is an apocalyptic number.

213203311 is a deficient number, since it is larger than the sum of its proper divisors (227513).

213203311 is an equidigital number, since it uses as much as digits as its factorization.

213203311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227512.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 213203311 is about 14601.4831780885. The cubic root of 213203311 is about 597.3992159744.

Adding to 213203311 its reverse (113302312), we get a palindrome (326505623).

Subtracting from 213203311 its reverse (113302312), we obtain a palindrome (99900999).

The spelling of 213203311 in words is "two hundred thirteen million, two hundred three thousand, three hundred eleven".