4425220781 has 2 divisors, whose sum is σ = 4425220782. Its totient is φ = 4425220780.

The previous prime is 4425220777. The next prime is 4425220817. The reversal of 4425220781 is 1870225244.

Together with next prime (4425220817) 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., 4330956100 + 94264681 = 65810^2 + 9709^2 .

It is a cyclic number.

It is not a de Polignac number, because 4425220781 - 2² = 4425220777 is a prime.

It is a super-2 number, since 2×4425220781² = 39165157921188499922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4425220771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2212610390 + 2212610391.

It is an arithmetic number, because the mean of its divisors is an integer number (2212610391).

Almost surely, 2^4425220781 is an apocalyptic number.

It is an amenable number.

4425220781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4425220781 is an equidigital number, since it uses as much as digits as its factorization.

4425220781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35840, while the sum is 35.

The square root of 4425220781 is about 66522.3329491683. The cubic root of 4425220781 is about 1641.7674754052.

The spelling of 4425220781 in words is "four billion, four hundred twenty-five million, two hundred twenty thousand, seven hundred eighty-one".