55420035220 has 72 divisors (see below), whose sum is σ = 129191242824. Its totient is φ = 19953120000.

The previous prime is 55420035211. The next prime is 55420035277. The reversal of 55420035220 is 2253002455.

It can be written as a sum of positive squares in 4 ways, for example, as 31825846404 + 23594188816 = 178398^2 + 153604^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131050 + ... + 357790.

It is an arithmetic number, because the mean of its divisors is an integer number (1794322817).

Almost surely, 2^55420035220 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 55420035220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64595621412).

55420035220 is an abundant number, since it is smaller than the sum of its proper divisors (73771207604).

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

55420035220 is a wasteful number, since it uses less digits than its factorization.

55420035220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226873 (or 226860 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

Adding to 55420035220 its reverse (2253002455), we get a palindrome (57673037675).

The spelling of 55420035220 in words is "fifty-five billion, four hundred twenty million, thirty-five thousand, two hundred twenty".