213242321331 has 96 divisors (see below), whose sum is σ = 347419800000. Its totient is φ = 129926135808.

The previous prime is 213242321263. The next prime is 213242321339. The reversal of 213242321331 is 133123242312.

213242321331 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 4 + 2 + 321 + 331 = 666.

It is not a de Polignac number, because 213242321331 - 2¹⁵ = 213242288563 is a prime.

It is a super-2 number, since 2×213242321331² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 213242321295 and 213242321304.

It is not an unprimeable number, because it can be changed into a prime (213242321339) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 211339755 + ... + 211340763.

It is an arithmetic number, because the mean of its divisors is an integer number (3618956250).

Almost surely, 2^213242321331 is an apocalyptic number.

213242321331 is a deficient number, since it is larger than the sum of its proper divisors (134177478669).

213242321331 is a wasteful number, since it uses less digits than its factorization.

213242321331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635 (or 1623 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 213242321331 its reverse (133123242312), we get a palindrome (346365563643).

The spelling of 213242321331 in words is "two hundred thirteen billion, two hundred forty-two million, three hundred twenty-one thousand, three hundred thirty-one".