2212312131 has 12 divisors (see below), whose sum is σ = 3197783160. Its totient is φ = 1473849600.

The previous prime is 2212312127. The next prime is 2212312133. The reversal of 2212312131 is 1312132122.

2212312131 is a `hidden beast` number, since 221 + 2 + 312 + 131 = 666.

It is not a de Polignac number, because 2212312131 - 2² = 2212312127 is a prime.

It is a super-2 number, since 2×2212312131² = 9788649929939522322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2212312133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71646 + ... + 97763.

It is an arithmetic number, because the mean of its divisors is an integer number (266481930).

Almost surely, 2^2212312131 is an apocalyptic number.

2212312131 is a deficient number, since it is larger than the sum of its proper divisors (985471029).

2212312131 is a wasteful number, since it uses less digits than its factorization.

2212312131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170866 (or 170863 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2212312131 is about 47035.2222382333. Note that the first 4 decimals coincide. The cubic root of 2212312131 is about 1303.0131548609.

Adding to 2212312131 its reverse (1312132122), we get a palindrome (3524444253).

Subtracting from 2212312131 its reverse (1312132122), we obtain a square (900180009 = 30003²).

The spelling of 2212312131 in words is "two billion, two hundred twelve million, three hundred twelve thousand, one hundred thirty-one".