213132313331 has 4 divisors (see below), whose sum is σ = 243579786672. Its totient is φ = 182684839992.

The previous prime is 213132313321. The next prime is 213132313349. The reversal of 213132313331 is 133313231312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213132313331 - 2³⁰ = 212058571507 is a prime.

It is a super-2 number, since 2×213132313331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213132313331.

It is not an unprimeable number, because it can be changed into a prime (213132313321) 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, 15223736660 + ... + 15223736673.

It is an arithmetic number, because the mean of its divisors is an integer number (60894946668).

Almost surely, 2^213132313331 is an apocalyptic number.

213132313331 is a deficient number, since it is larger than the sum of its proper divisors (30447473341).

213132313331 is an equidigital number, since it uses as much as digits as its factorization.

213132313331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30447473340.

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

Adding to 213132313331 its reverse (133313231312), we get a palindrome (346445544643).

The spelling of 213132313331 in words is "two hundred thirteen billion, one hundred thirty-two million, three hundred thirteen thousand, three hundred thirty-one".