22312144549 has 4 divisors (see below), whose sum is σ = 22425404364. Its totient is φ = 22198884736.

The previous prime is 22312144499. The next prime is 22312144579. The reversal of 22312144549 is 94544121322.

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 21493612449 + 818532100 = 146607^2 + 28610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22312144549 is a prime.

It is a super-3 number, since 3×22312144549³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22312144579) 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 in 3 ways as a sum of consecutive naturals, for example, 56629612 + ... + 56630005.

It is an arithmetic number, because the mean of its divisors is an integer number (5606351091).

Almost surely, 2^22312144549 is an apocalyptic number.

It is an amenable number.

22312144549 is a deficient number, since it is larger than the sum of its proper divisors (113259815).

22312144549 is a wasteful number, since it uses less digits than its factorization.

22312144549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113259814.

The product of its digits is 69120, while the sum is 37.

The spelling of 22312144549 in words is "twenty-two billion, three hundred twelve million, one hundred forty-four thousand, five hundred forty-nine".