1331323213 has 16 divisors (see below), whose sum is σ = 1504656000. Its totient is φ = 1166831680.

The previous prime is 1331323207. The next prime is 1331323229. The reversal of 1331323213 is 3123231331.

It is a cyclic number.

It is not a de Polignac number, because 1331323213 - 2⁵ = 1331323181 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 (1331323243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243888 + ... + 249286.

It is an arithmetic number, because the mean of its divisors is an integer number (94041000).

Almost surely, 2^1331323213 is an apocalyptic number.

It is an amenable number.

1331323213 is a deficient number, since it is larger than the sum of its proper divisors (173332787).

1331323213 is a wasteful number, since it uses less digits than its factorization.

1331323213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6212.

The product of its digits is 972, while the sum is 22.

The square root of 1331323213 is about 36487.3020789425. The cubic root of 1331323213 is about 1100.0890321876.

Adding to 1331323213 its reverse (3123231331), we get a palindrome (4454554544).

The spelling of 1331323213 in words is "one billion, three hundred thirty-one million, three hundred twenty-three thousand, two hundred thirteen".