221545355676343 has 4 divisors (see below), whose sum is σ = 221552612589040. Its totient is φ = 221538098763648.

The previous prime is 221545355676317. The next prime is 221545355676353. The reversal of 221545355676343 is 343676553545122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221545355676343 - 2¹⁷ = 221545355545271 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 (221545355676353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3628410555 + ... + 3628471612.

It is an arithmetic number, because the mean of its divisors is an integer number (55388153147260).

Almost surely, 2^{221545355676343} is an apocalyptic number.

221545355676343 is a deficient number, since it is larger than the sum of its proper divisors (7256912697).

221545355676343 is an equidigital number, since it uses as much as digits as its factorization.

221545355676343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7256912696.

The product of its digits is 272160000, while the sum is 61.

The spelling of 221545355676343 in words is "two hundred twenty-one trillion, five hundred forty-five billion, three hundred fifty-five million, six hundred seventy-six thousand, three hundred forty-three".