3225378781 has 2 divisors, whose sum is σ = 3225378782. Its totient is φ = 3225378780.

The previous prime is 3225378769. The next prime is 3225378817. The reversal of 3225378781 is 1878735223.

Together with next prime (3225378817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2414837881 + 810540900 = 49141^2 + 28470^2 .

It is an emirp because it is prime and its reverse (1878735223) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3225378781 - 2⁵ = 3225378749 is a prime.

It is a super-2 number, since 2×3225378781² = 20806136561850091922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3225078781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1612689390 + 1612689391.

It is an arithmetic number, because the mean of its divisors is an integer number (1612689391).

Almost surely, 2^3225378781 is an apocalyptic number.

It is an amenable number.

3225378781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3225378781 is an equidigital number, since it uses as much as digits as its factorization.

3225378781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 46.

The square root of 3225378781 is about 56792.4183408314. The cubic root of 3225378781 is about 1477.4980220865.

The spelling of 3225378781 in words is "three billion, two hundred twenty-five million, three hundred seventy-eight thousand, seven hundred eighty-one".