53553100221 has 6 divisors (see below), whose sum is σ = 77354478110. Its totient is φ = 35702066808.

The previous prime is 53553100213. The next prime is 53553100231. The reversal of 53553100221 is 12200135535.

It is a happy number.

53553100221 is a `hidden beast` number, since 5 + 3 + 553 + 100 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 51251979321 + 2301120900 = 226389^2 + 47970^2 .

It is not a de Polignac number, because 53553100221 - 2³ = 53553100213 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 (53553100231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2975172226 + ... + 2975172243.

Almost surely, 2^53553100221 is an apocalyptic number.

It is an amenable number.

53553100221 is a deficient number, since it is larger than the sum of its proper divisors (23801377889).

53553100221 is a wasteful number, since it uses less digits than its factorization.

53553100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5950344475 (or 5950344472 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 53553100221 its reverse (12200135535), we get a palindrome (65753235756).

The spelling of 53553100221 in words is "fifty-three billion, five hundred fifty-three million, one hundred thousand, two hundred twenty-one".