213320291 has 4 divisors (see below), whose sum is σ = 218281272. Its totient is φ = 208359312.

The previous prime is 213320287. The next prime is 213320293. The reversal of 213320291 is 192023312.

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 213320291 - 2² = 213320287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213320293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2480426 + ... + 2480511.

It is an arithmetic number, because the mean of its divisors is an integer number (54570318).

Almost surely, 2^213320291 is an apocalyptic number.

213320291 is a deficient number, since it is larger than the sum of its proper divisors (4960981).

213320291 is an equidigital number, since it uses as much as digits as its factorization.

213320291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960980.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 213320291 is about 14605.4883862198. The cubic root of 213320291 is about 597.5084559648.

The spelling of 213320291 in words is "two hundred thirteen million, three hundred twenty thousand, two hundred ninety-one".