22251162747 has 24 divisors (see below), whose sum is σ = 32621252608. Its totient is φ = 13481115120.

The previous prime is 22251162719. The next prime is 22251162761. The reversal of 22251162747 is 74726115222.

It is a happy number.

It is not a de Polignac number, because 22251162747 - 2⁶ = 22251162683 is a prime.

It is a super-2 number, since 2×22251162747² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22251182747) 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 23 ways as a sum of consecutive naturals, for example, 1344678 + ... + 1361124.

Almost surely, 2^22251162747 is an apocalyptic number.

22251162747 is a deficient number, since it is larger than the sum of its proper divisors (10370089861).

22251162747 is a wasteful number, since it uses less digits than its factorization.

22251162747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20199 (or 20188 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

Adding to 22251162747 its reverse (74726115222), we get a palindrome (96977277969).

The spelling of 22251162747 in words is "twenty-two billion, two hundred fifty-one million, one hundred sixty-two thousand, seven hundred forty-seven".