3912585221 has 2 divisors, whose sum is σ = 3912585222. Its totient is φ = 3912585220.

The previous prime is 3912585197. The next prime is 3912585289. The reversal of 3912585221 is 1225852193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2412184996 + 1500400225 = 49114^2 + 38735^2 .

It is an emirp because it is prime and its reverse (1225852193) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3912585221 - 2¹⁴ = 3912568837 is a prime.

It is a super-2 number, since 2×3912585221² = 30616646223175237682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3912585121) 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, 1956292610 + 1956292611.

It is an arithmetic number, because the mean of its divisors is an integer number (1956292611).

Almost surely, 2^3912585221 is an apocalyptic number.

It is an amenable number.

3912585221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3912585221 is an equidigital number, since it uses as much as digits as its factorization.

3912585221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 38.

The square root of 3912585221 is about 62550.6612355137. The cubic root of 3912585221 is about 1575.7522528624.

The spelling of 3912585221 in words is "three billion, nine hundred twelve million, five hundred eighty-five thousand, two hundred twenty-one".