53033621221 has 8 divisors (see below), whose sum is σ = 60769776320. Its totient is φ = 45337447008.

The previous prime is 53033621197. The next prime is 53033621233. The reversal of 53033621221 is 12212633035.

53033621221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 53033621221 - 2⁷ = 53033621093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53033621221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53033621021) 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, 9992376 + ... + 9997681.

It is an arithmetic number, because the mean of its divisors is an integer number (7596222040).

Almost surely, 2^53033621221 is an apocalyptic number.

It is an amenable number.

53033621221 is a deficient number, since it is larger than the sum of its proper divisors (7736155099).

53033621221 is a wasteful number, since it uses less digits than its factorization.

53033621221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19990443.

The product of its (nonzero) digits is 6480, while the sum is 28.

The spelling of 53033621221 in words is "fifty-three billion, thirty-three million, six hundred twenty-one thousand, two hundred twenty-one".