3221812667 has 2 divisors, whose sum is σ = 3221812668. Its totient is φ = 3221812666.

The previous prime is 3221812637. The next prime is 3221812669. The reversal of 3221812667 is 7662181223.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3221812667 - 2¹² = 3221808571 is a prime.

It is a super-2 number, since 2×3221812667² = 20760153722483305778, which contains 22 as substring.

Together with 3221812669, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3221812667.

It is not a weakly prime, because it can be changed into another prime (3221812669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610906333 + 1610906334.

It is an arithmetic number, because the mean of its divisors is an integer number (1610906334).

Almost surely, 2^3221812667 is an apocalyptic number.

3221812667 is a deficient number, since it is larger than the sum of its proper divisors (1).

3221812667 is an equidigital number, since it uses as much as digits as its factorization.

3221812667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 3221812667 is about 56761.0136185040. The cubic root of 3221812667 is about 1476.9532933604.

The spelling of 3221812667 in words is "three billion, two hundred twenty-one million, eight hundred twelve thousand, six hundred sixty-seven".