53205515221 has 8 divisors (see below), whose sum is σ = 54186140000. Its totient is φ = 52228387440.

The previous prime is 53205515219. The next prime is 53205515227. The reversal of 53205515221 is 12251550235.

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

It is a cyclic number.

It is not a de Polignac number, because 53205515221 - 2¹ = 53205515219 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 (53205515227) 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, 843531 + ... + 904408.

It is an arithmetic number, because the mean of its divisors is an integer number (6773267500).

Almost surely, 2^53205515221 is an apocalyptic number.

It is an amenable number.

53205515221 is a deficient number, since it is larger than the sum of its proper divisors (980624779).

53205515221 is a wasteful number, since it uses less digits than its factorization.

53205515221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748499.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 53205515221 in words is "fifty-three billion, two hundred five million, five hundred fifteen thousand, two hundred twenty-one".