55213212144 has 40 divisors (see below), whose sum is σ = 142974599040. Its totient is φ = 18360472768.

The previous prime is 55213212133. The next prime is 55213212199. The reversal of 55213212144 is 44121231255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1352532 + ... + 1392755.

It is an arithmetic number, because the mean of its divisors is an integer number (3574364976).

Almost surely, 2^55213212144 is an apocalyptic number.

It is an amenable number.

55213212144 is an abundant number, since it is smaller than the sum of its proper divisors (87761386896).

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

55213212144 is a wasteful number, since it uses less digits than its factorization.

55213212144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745717 (or 2745711 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

Adding to 55213212144 its reverse (44121231255), we get a palindrome (99334443399).

The spelling of 55213212144 in words is "fifty-five billion, two hundred thirteen million, two hundred twelve thousand, one hundred forty-four".