1312304213 has 4 divisors (see below), whose sum is σ = 1431604608. Its totient is φ = 1193003820.

The previous prime is 1312304207. The next prime is 1312304233. The reversal of 1312304213 is 3124032131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1312304213 - 2¹² = 1312300117 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 (1312304233) 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, 59650181 + ... + 59650202.

It is an arithmetic number, because the mean of its divisors is an integer number (357901152).

Almost surely, 2^1312304213 is an apocalyptic number.

It is an amenable number.

1312304213 is a deficient number, since it is larger than the sum of its proper divisors (119300395).

1312304213 is a wasteful number, since it uses less digits than its factorization.

1312304213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119300394.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1312304213 is about 36225.7396473833. The cubic root of 1312304213 is about 1094.8253408099.

Adding to 1312304213 its reverse (3124032131), we get a palindrome (4436336344).

The spelling of 1312304213 in words is "one billion, three hundred twelve million, three hundred four thousand, two hundred thirteen".