4422981781 has 2 divisors, whose sum is σ = 4422981782. Its totient is φ = 4422981780.

The previous prime is 4422981713. The next prime is 4422981791. The reversal of 4422981781 is 1871892244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3902001156 + 520980625 = 62466^2 + 22825^2 .

It is a cyclic number.

It is not a de Polignac number, because 4422981781 - 2³¹ = 2275498133 is a prime.

It is a super-2 number, since 2×4422981781² = 39125535670115863922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4422981701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2211490890 + 2211490891.

It is an arithmetic number, because the mean of its divisors is an integer number (2211490891).

Almost surely, 2^4422981781 is an apocalyptic number.

It is an amenable number.

4422981781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4422981781 is an equidigital number, since it uses as much as digits as its factorization.

4422981781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 46.

The square root of 4422981781 is about 66505.5018851824. The cubic root of 4422981781 is about 1641.4905372445.

The spelling of 4422981781 in words is "four billion, four hundred twenty-two million, nine hundred eighty-one thousand, seven hundred eighty-one".