55054200021 has 16 divisors (see below), whose sum is σ = 73546881408. Its totient is φ = 36632217600.

The previous prime is 55054200007. The next prime is 55054200029. The reversal of 55054200021 is 12000245055.

It is a happy number.

It is not a de Polignac number, because 55054200021 - 2³⁰ = 53980458197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55054199964 and 55054200000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55054200029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4707301 + ... + 4718981.

It is an arithmetic number, because the mean of its divisors is an integer number (4596680088).

Almost surely, 2^55054200021 is an apocalyptic number.

It is an amenable number.

55054200021 is a deficient number, since it is larger than the sum of its proper divisors (18492681387).

55054200021 is a wasteful number, since it uses less digits than its factorization.

55054200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14572.

The product of its (nonzero) digits is 2000, while the sum is 24.

Adding to 55054200021 its reverse (12000245055), we get a palindrome (67054445076).

The spelling of 55054200021 in words is "fifty-five billion, fifty-four million, two hundred thousand, twenty-one".