1320233213 has 4 divisors (see below), whose sum is σ = 1421789628. Its totient is φ = 1218676800.

The previous prime is 1320233203. The next prime is 1320233219. The reversal of 1320233213 is 3123320231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 892694884 + 427538329 = 29878^2 + 20677^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320233213 - 2⁴ = 1320233197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320233219) 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 in 3 ways as a sum of consecutive naturals, for example, 50778188 + ... + 50778213.

It is an arithmetic number, because the mean of its divisors is an integer number (355447407).

Almost surely, 2^1320233213 is an apocalyptic number.

1320233213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1320233213 is a deficient number, since it is larger than the sum of its proper divisors (101556415).

1320233213 is a wasteful number, since it uses less digits than its factorization.

1320233213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101556414.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1320233213 is about 36335.0135957041. The cubic root of 1320233213 is about 1097.0259091162.

Adding to 1320233213 its reverse (3123320231), we get a palindrome (4443553444).

The spelling of 1320233213 in words is "one billion, three hundred twenty million, two hundred thirty-three thousand, two hundred thirteen".