22125220065 has 40 divisors (see below), whose sum is σ = 42712400808. Its totient is φ = 10892413440.

The previous prime is 22125220057. The next prime is 22125220079. The reversal of 22125220065 is 56002252122.

It can be written as a sum of positive squares in 4 ways, for example, as 1451381409 + 20673838656 = 38097^2 + 143784^2 .

It is not a de Polignac number, because 22125220065 - 2³ = 22125220057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2095896 + ... + 2106425.

Almost surely, 2^22125220065 is an apocalyptic number.

It is an amenable number.

22125220065 is a deficient number, since it is larger than the sum of its proper divisors (20587180743).

22125220065 is a wasteful number, since it uses less digits than its factorization.

22125220065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202351 (or 4202342 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 22125220065 its reverse (56002252122), we get a palindrome (78127472187).

The spelling of 22125220065 in words is "twenty-two billion, one hundred twenty-five million, two hundred twenty thousand, sixty-five".