213550244321 has 2 divisors, whose sum is σ = 213550244322. Its totient is φ = 213550244320.

The previous prime is 213550244287. The next prime is 213550244333. The reversal of 213550244321 is 123442055312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204249763600 + 9300480721 = 451940^2 + 96439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213550244321 is a prime.

It is not a weakly prime, because it can be changed into another prime (213550244021) 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 as a sum of consecutive naturals, namely, 106775122160 + 106775122161.

It is an arithmetic number, because the mean of its divisors is an integer number (106775122161).

Almost surely, 2^213550244321 is an apocalyptic number.

It is an amenable number.

213550244321 is a deficient number, since it is larger than the sum of its proper divisors (1).

213550244321 is an equidigital number, since it uses as much as digits as its factorization.

213550244321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 213550244321 its reverse (123442055312), we get a palindrome (336992299633).

The spelling of 213550244321 in words is "two hundred thirteen billion, five hundred fifty million, two hundred forty-four thousand, three hundred twenty-one".