53205534221 has 24 divisors (see below), whose sum is σ = 63612043776. Its totient is φ = 44349832800.

The previous prime is 53205534209. The next prime is 53205534223. The reversal of 53205534221 is 12243550235.

It is a de Polignac number, because none of the positive numbers 2^k-53205534221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53205534223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 287996 + ... + 435146.

It is an arithmetic number, because the mean of its divisors is an integer number (2650501824).

Almost surely, 2^53205534221 is an apocalyptic number.

It is an amenable number.

53205534221 is a deficient number, since it is larger than the sum of its proper divisors (10406509555).

53205534221 is a wasteful number, since it uses less digits than its factorization.

53205534221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147369 (or 147362 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 53205534221 in words is "fifty-three billion, two hundred five million, five hundred thirty-four thousand, two hundred twenty-one".