57216055110221 has 24 divisors (see below), whose sum is σ = 66486687433920. Its totient is φ = 48233010055680.

The previous prime is 57216055110089. The next prime is 57216055110311. The reversal of 57216055110221 is 12201155061275.

It is a happy number.

It is not a de Polignac number, because 57216055110221 - 2³⁸ = 56941177203277 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 (57216055116221) 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, 244125590 + ... + 244359848.

It is an arithmetic number, because the mean of its divisors is an integer number (2770278643080).

Almost surely, 2^{57216055110221} is an apocalyptic number.

It is an amenable number.

57216055110221 is a deficient number, since it is larger than the sum of its proper divisors (9270632323699).

57216055110221 is an equidigital number, since it uses as much as digits as its factorization.

57216055110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243765 (or 243704 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 38.

The spelling of 57216055110221 in words is "fifty-seven trillion, two hundred sixteen billion, fifty-five million, one hundred ten thousand, two hundred twenty-one".