22431221144 has 8 divisors (see below), whose sum is σ = 42058539660. Its totient is φ = 11215610568.

The previous prime is 22431221101. The next prime is 22431221147. The reversal of 22431221144 is 44112213422.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×22431221144² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22431221147) by changing a digit.

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 as a sum of consecutive naturals, namely, 1401951314 + ... + 1401951329.

Almost surely, 2^22431221144 is an apocalyptic number.

It is an amenable number.

22431221144 is a deficient number, since it is larger than the sum of its proper divisors (19627318516).

22431221144 is a wasteful number, since it uses less digits than its factorization.

22431221144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803902649 (or 2803902645 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

Adding to 22431221144 its reverse (44112213422), we get a palindrome (66543434566).

The spelling of 22431221144 in words is "twenty-two billion, four hundred thirty-one million, two hundred twenty-one thousand, one hundred forty-four".