213131321313 has 8 divisors (see below), whose sum is σ = 284206660608. Its totient is φ = 142071764784.

The previous prime is 213131321311. The next prime is 213131321317. The reversal of 213131321313 is 313123131312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213131321313 - 2¹ = 213131321311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213131321311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3914145 + ... + 3968222.

It is an arithmetic number, because the mean of its divisors is an integer number (35525832576).

Almost surely, 2^213131321313 is an apocalyptic number.

It is an amenable number.

213131321313 is a deficient number, since it is larger than the sum of its proper divisors (71075339295).

213131321313 is an equidigital number, since it uses as much as digits as its factorization.

213131321313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7891383.

The product of its digits is 972, while the sum is 24.

Adding to 213131321313 its reverse (313123131312), we get a palindrome (526254452625).

The spelling of 213131321313 in words is "two hundred thirteen billion, one hundred thirty-one million, three hundred twenty-one thousand, three hundred thirteen".