212668031 has 2 divisors, whose sum is σ = 212668032. Its totient is φ = 212668030.

The previous prime is 212668003. The next prime is 212668039. The reversal of 212668031 is 130866212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212668031 is a prime.

It is a super-2 number, since 2×212668031² = 90455382818833922, 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 = 212667985 and 212668003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212668039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106334015 + 106334016.

It is an arithmetic number, because the mean of its divisors is an integer number (106334016).

Almost surely, 2^212668031 is an apocalyptic number.

212668031 is a deficient number, since it is larger than the sum of its proper divisors (1).

212668031 is an equidigital number, since it uses as much as digits as its factorization.

212668031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 212668031 is about 14583.1420139831. The cubic root of 212668031 is about 596.8988425040.

The spelling of 212668031 in words is "two hundred twelve million, six hundred sixty-eight thousand, thirty-one".