55333221312 has 112 divisors (see below), whose sum is σ = 148317143040. Its totient is φ = 18204705792.

The previous prime is 55333221299. The next prime is 55333221347. The reversal of 55333221312 is 21312233355.

It is a happy number.

55333221312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55333221312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4797889 + ... + 4809407.

Almost surely, 2^55333221312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55333221312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74158571520).

55333221312 is an abundant number, since it is smaller than the sum of its proper divisors (92983921728).

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

55333221312 is a wasteful number, since it uses less digits than its factorization.

55333221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11858 (or 11848 counting only the distinct ones).

The product of its digits is 16200, while the sum is 30.

Adding to 55333221312 its reverse (21312233355), we get a palindrome (76645454667).

The spelling of 55333221312 in words is "fifty-five billion, three hundred thirty-three million, two hundred twenty-one thousand, three hundred twelve".