2213351521 has 2 divisors, whose sum is σ = 2213351522. Its totient is φ = 2213351520.

The previous prime is 2213351519. The next prime is 2213351527. The reversal of 2213351521 is 1251533122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2046657600 + 166693921 = 45240^2 + 12911^2 .

It is a cyclic number.

It is not a de Polignac number, because 2213351521 - 2¹ = 2213351519 is a prime.

Together with 2213351519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2213351527) 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 as a sum of consecutive naturals, namely, 1106675760 + 1106675761.

It is an arithmetic number, because the mean of its divisors is an integer number (1106675761).

Almost surely, 2^2213351521 is an apocalyptic number.

It is an amenable number.

2213351521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2213351521 is an equidigital number, since it uses as much as digits as its factorization.

2213351521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 2213351521 is about 47046.2700009257. The cubic root of 2213351521 is about 1303.2171837560.

Adding to 2213351521 its reverse (1251533122), we get a palindrome (3464884643).

The spelling of 2213351521 in words is "two billion, two hundred thirteen million, three hundred fifty-one thousand, five hundred twenty-one".