22751665081 has 2 divisors, whose sum is σ = 22751665082. Its totient is φ = 22751665080.

The previous prime is 22751665043. The next prime is 22751665091. The reversal of 22751665081 is 18056615722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22751197225 + 467856 = 150835^2 + 684^2 .

It is a cyclic number.

It is not a de Polignac number, because 22751665081 - 2⁹ = 22751664569 is a prime.

It is a super-2 number, since 2×22751665081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22751665031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11375832540 + 11375832541.

It is an arithmetic number, because the mean of its divisors is an integer number (11375832541).

Almost surely, 2^22751665081 is an apocalyptic number.

It is an amenable number.

22751665081 is a deficient number, since it is larger than the sum of its proper divisors (1).

22751665081 is an equidigital number, since it uses as much as digits as its factorization.

22751665081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 22751665081 in words is "twenty-two billion, seven hundred fifty-one million, six hundred sixty-five thousand, eighty-one".