55220543140 has 216 divisors, whose sum is σ = 145918274040. Its totient is φ = 17480365056.

The previous prime is 55220543129. The next prime is 55220543141. The reversal of 55220543140 is 4134502255.

It can be written as a sum of positive squares in 4 ways, for example, as 269682084 + 54950861056 = 16422^2 + 234416^2 .

It is not an unprimeable number, because it can be changed into a prime (55220543141) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 15032344 + ... + 15036016.

It is an arithmetic number, because the mean of its divisors is an integer number (675547565).

Almost surely, 2^55220543140 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 55220543140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72959137020).

55220543140 is an abundant number, since it is smaller than the sum of its proper divisors (90697730900).

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

55220543140 is a wasteful number, since it uses less digits than its factorization.

55220543140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771 (or 3739 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 55220543140 in words is "fifty-five billion, two hundred twenty million, five hundred forty-three thousand, one hundred forty".