22165643501 has 2 divisors, whose sum is σ = 22165643502. Its totient is φ = 22165643500.

The previous prime is 22165643497. The next prime is 22165643503. The reversal of 22165643501 is 10534656122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22163467876 + 2175625 = 148874^2 + 1475^2 .

It is a cyclic number.

It is not a de Polignac number, because 22165643501 - 2² = 22165643497 is a prime.

Together with 22165643503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22165643503) 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, 11082821750 + 11082821751.

It is an arithmetic number, because the mean of its divisors is an integer number (11082821751).

Almost surely, 2^22165643501 is an apocalyptic number.

It is an amenable number.

22165643501 is a deficient number, since it is larger than the sum of its proper divisors (1).

22165643501 is an equidigital number, since it uses as much as digits as its factorization.

22165643501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 22165643501 in words is "twenty-two billion, one hundred sixty-five million, six hundred forty-three thousand, five hundred one".