213131233313 has 4 divisors (see below), whose sum is σ = 213504493488. Its totient is φ = 212757973140.

The previous prime is 213131233297. The next prime is 213131233339. The reversal of 213131233313 is 313332131312.

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 213131233313 - 2⁴ = 213131233297 is a prime.

It is a super-2 number, since 2×213131233313² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213131232313) 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, 186629231 + ... + 186630372.

It is an arithmetic number, because the mean of its divisors is an integer number (53376123372).

Almost surely, 2^213131233313 is an apocalyptic number.

It is an amenable number.

213131233313 is a deficient number, since it is larger than the sum of its proper divisors (373260175).

213131233313 is an equidigital number, since it uses as much as digits as its factorization.

213131233313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373260174.

The product of its digits is 2916, while the sum is 26.

Adding to 213131233313 its reverse (313332131312), we get a palindrome (526463364625).

The spelling of 213131233313 in words is "two hundred thirteen billion, one hundred thirty-one million, two hundred thirty-three thousand, three hundred thirteen".