55510200021 has 8 divisors (see below), whose sum is σ = 74485024864. Its totient is φ = 36771087600.

The previous prime is 55510200007. The next prime is 55510200059. The reversal of 55510200021 is 12000201555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55510200021 - 2⁷ = 55510199893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55510200001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58927555 + ... + 58928496.

It is an arithmetic number, because the mean of its divisors is an integer number (9310628108).

Almost surely, 2^55510200021 is an apocalyptic number.

It is an amenable number.

55510200021 is a deficient number, since it is larger than the sum of its proper divisors (18974824843).

55510200021 is a wasteful number, since it uses less digits than its factorization.

55510200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117856211.

The product of its (nonzero) digits is 500, while the sum is 21.

Adding to 55510200021 its reverse (12000201555), we get a palindrome (67510401576).

The spelling of 55510200021 in words is "fifty-five billion, five hundred ten million, two hundred thousand, twenty-one".