22144320061 has 4 divisors (see below), whose sum is σ = 22145818300. Its totient is φ = 22142821824.

The previous prime is 22144320053. The next prime is 22144320091. The reversal of 22144320061 is 16002344122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19597200100 + 2547119961 = 139990^2 + 50469^2 .

It is a cyclic number.

It is not a de Polignac number, because 22144320061 - 2³ = 22144320053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22144320091) 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 in 3 ways as a sum of consecutive naturals, for example, 726726 + ... + 756583.

It is an arithmetic number, because the mean of its divisors is an integer number (5536454575).

Almost surely, 2^22144320061 is an apocalyptic number.

It is an amenable number.

22144320061 is a deficient number, since it is larger than the sum of its proper divisors (1498239).

22144320061 is a wasteful number, since it uses less digits than its factorization.

22144320061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498238.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 22144320061 its reverse (16002344122), we get a palindrome (38146664183).

The spelling of 22144320061 in words is "twenty-two billion, one hundred forty-four million, three hundred twenty thousand, sixty-one".