2166221655353 has 16 divisors (see below), whose sum is σ = 2481863991936. Its totient is φ = 1852128996480.

The previous prime is 2166221655347. The next prime is 2166221655397. The reversal of 2166221655353 is 3535561226612.

It is not a de Polignac number, because 2166221655353 - 2⁴ = 2166221655337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2166221655298 and 2166221655307.

It is not an unprimeable number, because it can be changed into a prime (2166221658353) 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, 6128675 + ... + 6472487.

It is an arithmetic number, because the mean of its divisors is an integer number (155116499496).

Almost surely, 2^{2166221655353} is an apocalyptic number.

It is an amenable number.

2166221655353 is a deficient number, since it is larger than the sum of its proper divisors (315642336583).

2166221655353 is a wasteful number, since it uses less digits than its factorization.

2166221655353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346064.

The product of its digits is 1944000, while the sum is 47.

The spelling of 2166221655353 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-one million, six hundred fifty-five thousand, three hundred fifty-three".