22520081 has 2 divisors, whose sum is σ = 22520082. Its totient is φ = 22520080.

The previous prime is 22520077. The next prime is 22520083. The reversal of 22520081 is 18002522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22420225 + 99856 = 4735^2 + 316^2 .

It is a cyclic number.

It is not a de Polignac number, because 22520081 - 2² = 22520077 is a prime.

It is a super-2 number, since 2×22520081² = 1014308096493122, which contains 22 as substring.

Together with 22520083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22520083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11260040 + 11260041.

It is an arithmetic number, because the mean of its divisors is an integer number (11260041).

Almost surely, 2^22520081 is an apocalyptic number.

It is an amenable number.

22520081 is a deficient number, since it is larger than the sum of its proper divisors (1).

22520081 is an equidigital number, since it uses as much as digits as its factorization.

22520081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 22520081 is about 4745.5327414317. The cubic root of 22520081 is about 282.3947701110.

The spelling of 22520081 in words is "twenty-two million, five hundred twenty thousand, eighty-one".