213319943 has 4 divisors (see below), whose sum is σ = 216242208. Its totient is φ = 210397680.

The previous prime is 213319933. The next prime is 213319949. The reversal of 213319943 is 349913312.

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

It is not a de Polignac number, because 213319943 - 2¹⁸ = 213057799 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 (213319949) 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, 1461023 + ... + 1461168.

It is an arithmetic number, because the mean of its divisors is an integer number (54060552).

Almost surely, 2^213319943 is an apocalyptic number.

213319943 is a deficient number, since it is larger than the sum of its proper divisors (2922265).

213319943 is an equidigital number, since it uses as much as digits as its factorization.

213319943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2922264.

The product of its digits is 17496, while the sum is 35.

The square root of 213319943 is about 14605.4764728851. The cubic root of 213319943 is about 597.5081310495.

The spelling of 213319943 in words is "two hundred thirteen million, three hundred nineteen thousand, nine hundred forty-three".