1331330213 has 4 divisors (see below), whose sum is σ = 1332354828. Its totient is φ = 1330305600.

The previous prime is 1331330191. The next prime is 1331330219. The reversal of 1331330213 is 3120331331.

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 250367329 + 1080962884 = 15823^2 + 32878^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331330213 - 2⁶ = 1331330149 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 (1331330219) 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, 510356 + ... + 512957.

It is an arithmetic number, because the mean of its divisors is an integer number (333088707).

Almost surely, 2^1331330213 is an apocalyptic number.

It is an amenable number.

1331330213 is a deficient number, since it is larger than the sum of its proper divisors (1024615).

1331330213 is a wasteful number, since it uses less digits than its factorization.

1331330213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024614.

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 1331330213 is about 36487.3980025981. The cubic root of 1331330213 is about 1100.0909602468.

Adding to 1331330213 its reverse (3120331331), we get a palindrome (4451661544).

The spelling of 1331330213 in words is "one billion, three hundred thirty-one million, three hundred thirty thousand, two hundred thirteen".