3153216221 has 2 divisors, whose sum is σ = 3153216222. Its totient is φ = 3153216220.

The previous prime is 3153216203. The next prime is 3153216247. The reversal of 3153216221 is 1226123513.

It is a happy number.

It is an a-pointer prime, because the next prime (3153216247) can be obtained adding 3153216221 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1719760900 + 1433455321 = 41470^2 + 37861^2 .

It is a cyclic number.

It is not a de Polignac number, because 3153216221 - 2²² = 3149021917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3153216721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1576608110 + 1576608111.

It is an arithmetic number, because the mean of its divisors is an integer number (1576608111).

Almost surely, 2^3153216221 is an apocalyptic number.

It is an amenable number.

3153216221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3153216221 is an equidigital number, since it uses as much as digits as its factorization.

3153216221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 3153216221 is about 56153.5058656180. The cubic root of 3153216221 is about 1466.3959438739.

Adding to 3153216221 its reverse (1226123513), we get a palindrome (4379339734).

The spelling of 3153216221 in words is "three billion, one hundred fifty-three million, two hundred sixteen thousand, two hundred twenty-one".