213422321 has 8 divisors (see below), whose sum is σ = 251779584. Its totient is φ = 177032160.

The previous prime is 213422317. The next prime is 213422323. The reversal of 213422321 is 123224312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213422321 - 2² = 213422317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213422293 and 213422302.

It is not an unprimeable number, because it can be changed into a prime (213422323) 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 7 ways as a sum of consecutive naturals, for example, 491540 + ... + 491973.

It is an arithmetic number, because the mean of its divisors is an integer number (31472448).

Almost surely, 2^213422321 is an apocalyptic number.

It is an amenable number.

213422321 is a deficient number, since it is larger than the sum of its proper divisors (38357263).

213422321 is an equidigital number, since it uses as much as digits as its factorization.

213422321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983551.

The product of its digits is 576, while the sum is 20.

The square root of 213422321 is about 14608.9808337201. The cubic root of 213422321 is about 597.6037025234.

Adding to 213422321 its reverse (123224312), we get a palindrome (336646633).

The spelling of 213422321 in words is "two hundred thirteen million, four hundred twenty-two thousand, three hundred twenty-one".