3215081 has 2 divisors, whose sum is σ = 3215082. Its totient is φ = 3215080.

The previous prime is 3215071. The next prime is 3215083. The reversal of 3215081 is 1805123.

3215081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3115225 + 99856 = 1765^2 + 316^2 .

It is an emirp because it is prime and its reverse (1805123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3215081 is a prime.

It is a super-2 number, since 2×3215081² = 20673491673122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 3215083, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3215083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1607540 + 1607541.

It is an arithmetic number, because the mean of its divisors is an integer number (1607541).

Almost surely, 2^3215081 is an apocalyptic number.

It is an amenable number.

3215081 is a deficient number, since it is larger than the sum of its proper divisors (1).

3215081 is an equidigital number, since it uses as much as digits as its factorization.

3215081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 3215081 is about 1793.0646948730. The cubic root of 3215081 is about 147.5923925594.

The spelling of 3215081 in words is "three million, two hundred fifteen thousand, eighty-one".