213143322331 has 16 divisors (see below), whose sum is σ = 215152418880. Its totient is φ = 211143139200.

The previous prime is 213143322323. The next prime is 213143322367. The reversal of 213143322331 is 133223341312.

It is a cyclic number.

It is not a de Polignac number, because 213143322331 - 2³ = 213143322323 is a prime.

It is a super-2 number, since 2×213143322331² (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 213143322331.

It is not an unprimeable number, because it can be changed into a prime (213143322311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133464025 + ... + 133465621.

It is an arithmetic number, because the mean of its divisors is an integer number (13447026180).

Almost surely, 2^213143322331 is an apocalyptic number.

213143322331 is a deficient number, since it is larger than the sum of its proper divisors (2009096549).

213143322331 is a wasteful number, since it uses less digits than its factorization.

213143322331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3654.

The product of its digits is 7776, while the sum is 28.

Adding to 213143322331 its reverse (133223341312), we get a palindrome (346366663643).

The spelling of 213143322331 in words is "two hundred thirteen billion, one hundred forty-three million, three hundred twenty-two thousand, three hundred thirty-one".