55243212144 has 20 divisors (see below), whose sum is σ = 142711631496. Its totient is φ = 18414404032.

The previous prime is 55243212113. The next prime is 55243212149. The reversal of 55243212144 is 44121234255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55243212149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575450079 + ... + 575450174.

Almost surely, 2^55243212144 is an apocalyptic number.

It is an amenable number.

55243212144 is an abundant number, since it is smaller than the sum of its proper divisors (87468419352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55243212144 is a wasteful number, since it uses less digits than its factorization.

55243212144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150900264 (or 1150900258 counting only the distinct ones).

The product of its digits is 38400, while the sum is 33.

Adding to 55243212144 its reverse (44121234255), we get a palindrome (99364446399).

The spelling of 55243212144 in words is "fifty-five billion, two hundred forty-three million, two hundred twelve thousand, one hundred forty-four".