55233321312 has 96 divisors (see below), whose sum is σ = 156204472032. Its totient is φ = 16987889664.

The previous prime is 55233321307. The next prime is 55233321329. The reversal of 55233321312 is 21312333255.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 55233321312.

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, 3607818 + ... + 3623094.

It is an arithmetic number, because the mean of its divisors is an integer number (1627129917).

Almost surely, 2^55233321312 is an apocalyptic number.

55233321312 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55233321312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78102236016).

55233321312 is an abundant number, since it is smaller than the sum of its proper divisors (100971150720).

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

55233321312 is a wasteful number, since it uses less digits than its factorization.

55233321312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18200 (or 18192 counting only the distinct ones).

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

Adding to 55233321312 its reverse (21312333255), we get a palindrome (76545654567).

The spelling of 55233321312 in words is "fifty-five billion, two hundred thirty-three million, three hundred twenty-one thousand, three hundred twelve".