53571720700221 has 16 divisors (see below), whose sum is σ = 71622571991040. Its totient is φ = 35617693461680.

The previous prime is 53571720700217. The next prime is 53571720700247. The reversal of 53571720700221 is 12200702717535.

It is a cyclic number.

It is not a de Polignac number, because 53571720700221 - 2² = 53571720700217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53571720700721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9284350 + ... + 13904768.

It is an arithmetic number, because the mean of its divisors is an integer number (4476410749440).

Almost surely, 2^{53571720700221} is an apocalyptic number.

It is an amenable number.

53571720700221 is a deficient number, since it is larger than the sum of its proper divisors (18050851290819).

53571720700221 is a wasteful number, since it uses less digits than its factorization.

53571720700221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4630896.

The product of its (nonzero) digits is 205800, while the sum is 42.

The spelling of 53571720700221 in words is "fifty-three trillion, five hundred seventy-one billion, seven hundred twenty million, seven hundred thousand, two hundred twenty-one".