212313331 has 2 divisors, whose sum is σ = 212313332. Its totient is φ = 212313330.

The previous prime is 212313319. The next prime is 212313337. The reversal of 212313331 is 133313212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212313331 is a prime.

It is a super-2 number, since 2×212313331² = 90153901040631122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 212313299 and 212313308.

It is not a weakly prime, because it can be changed into another prime (212313337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106156665 + 106156666.

It is an arithmetic number, because the mean of its divisors is an integer number (106156666).

Almost surely, 2^212313331 is an apocalyptic number.

212313331 is a deficient number, since it is larger than the sum of its proper divisors (1).

212313331 is an equidigital number, since it uses as much as digits as its factorization.

212313331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 19.

The square root of 212313331 is about 14570.9756365180. The cubic root of 212313331 is about 596.5668104101.

Adding to 212313331 its reverse (133313212), we get a palindrome (345626543).

The spelling of 212313331 in words is "two hundred twelve million, three hundred thirteen thousand, three hundred thirty-one".