1320332213 has 4 divisors (see below), whose sum is σ = 1365860940. Its totient is φ = 1274803488.

The previous prime is 1320332147. The next prime is 1320332231. The reversal of 1320332213 is 3122330231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3122330231 = 73 ⋅42771647.

It can be written as a sum of positive squares in 2 ways, for example, as 1096470769 + 223861444 = 33113^2 + 14962^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320332213 - 2¹⁰ = 1320331189 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 (1320352213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22764320 + ... + 22764377.

It is an arithmetic number, because the mean of its divisors is an integer number (341465235).

Almost surely, 2^1320332213 is an apocalyptic number.

It is an amenable number.

1320332213 is a deficient number, since it is larger than the sum of its proper divisors (45528727).

1320332213 is an equidigital number, since it uses as much as digits as its factorization.

1320332213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45528726.

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

The square root of 1320332213 is about 36336.3758924855. The cubic root of 1320332213 is about 1097.0533292339.

Adding to 1320332213 its reverse (3122330231), we get a palindrome (4442662444).

The spelling of 1320332213 in words is "one billion, three hundred twenty million, three hundred thirty-two thousand, two hundred thirteen".