53055452221 has 4 divisors (see below), whose sum is σ = 53055998944. Its totient is φ = 53054905500.

The previous prime is 53055452213. The next prime is 53055452243. The reversal of 53055452221 is 12225455035.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 53055452221 - 2³ = 53055452213 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 (53055752221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84135 + ... + 336436.

It is an arithmetic number, because the mean of its divisors is an integer number (13263999736).

Almost surely, 2^53055452221 is an apocalyptic number.

It is an amenable number.

53055452221 is a deficient number, since it is larger than the sum of its proper divisors (546723).

53055452221 is a wasteful number, since it uses less digits than its factorization.

53055452221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546722.

The product of its (nonzero) digits is 60000, while the sum is 34.

The spelling of 53055452221 in words is "fifty-three billion, fifty-five million, four hundred fifty-two thousand, two hundred twenty-one".