1326521213 has 2 divisors, whose sum is σ = 1326521214. Its totient is φ = 1326521212.

The previous prime is 1326521143. The next prime is 1326521239. The reversal of 1326521213 is 3121256231.

It is a happy number.

It is an a-pointer prime, because the next prime (1326521239) can be obtained adding 1326521213 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1126072249 + 200448964 = 33557^2 + 14158^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326521213 - 2²² = 1322326909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1326521263) 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, 663260606 + 663260607.

It is an arithmetic number, because the mean of its divisors is an integer number (663260607).

Almost surely, 2^1326521213 is an apocalyptic number.

It is an amenable number.

1326521213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326521213 is an equidigital number, since it uses as much as digits as its factorization.

1326521213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 1326521213 is about 36421.4389199548. The cubic root of 1326521213 is about 1098.7647878548.

Adding to 1326521213 its reverse (3121256231), we get a palindrome (4447777444).

The spelling of 1326521213 in words is "one billion, three hundred twenty-six million, five hundred twenty-one thousand, two hundred thirteen".