3224166821 has 2 divisors, whose sum is σ = 3224166822. Its totient is φ = 3224166820.

The previous prime is 3224166817. The next prime is 3224166823. The reversal of 3224166821 is 1286614223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2217373921 + 1006792900 = 47089^2 + 31730^2 .

It is a cyclic number.

It is not a de Polignac number, because 3224166821 - 2² = 3224166817 is a prime.

Together with 3224166823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3224166823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1612083410 + 1612083411.

It is an arithmetic number, because the mean of its divisors is an integer number (1612083411).

Almost surely, 2^3224166821 is an apocalyptic number.

It is an amenable number.

3224166821 is a deficient number, since it is larger than the sum of its proper divisors (1).

3224166821 is an equidigital number, since it uses as much as digits as its factorization.

3224166821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 35.

The square root of 3224166821 is about 56781.7472520880. The cubic root of 3224166821 is about 1477.3129386222.

The spelling of 3224166821 in words is "three billion, two hundred twenty-four million, one hundred sixty-six thousand, eight hundred twenty-one".