10222781 has 2 divisors, whose sum is σ = 10222782. Its totient is φ = 10222780.

The previous prime is 10222769. The next prime is 10222801. The reversal of 10222781 is 18722201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7107556 + 3115225 = 2666^2 + 1765^2 .

It is a cyclic number.

It is not a de Polignac number, because 10222781 - 2⁶ = 10222717 is a prime.

It is a super-2 number, since 2×10222781² = 209010502747922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10222711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5111390 + 5111391.

It is an arithmetic number, because the mean of its divisors is an integer number (5111391).

Almost surely, 2^10222781 is an apocalyptic number.

It is an amenable number.

10222781 is a deficient number, since it is larger than the sum of its proper divisors (1).

10222781 is an equidigital number, since it uses as much as digits as its factorization.

10222781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 10222781 is about 3197.3083992634. The cubic root of 10222781 is about 217.0316234431.

Adding to 10222781 its reverse (18722201), we get a palindrome (28944982).

The spelling of 10222781 in words is "ten million, two hundred twenty-two thousand, seven hundred eighty-one".