221363025564543 has 4 divisors (see below), whose sum is σ = 295150700752728. Its totient is φ = 147575350376360.

The previous prime is 221363025564521. The next prime is 221363025564559. The reversal of 221363025564543 is 345465520363122.

It is a happy number.

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 221363025564543 - 2¹⁸ = 221363025302399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221363025563543) 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, 36893837594088 + ... + 36893837594093.

It is an arithmetic number, because the mean of its divisors is an integer number (73787675188182).

Almost surely, 2^{221363025564543} is an apocalyptic number.

221363025564543 is a deficient number, since it is larger than the sum of its proper divisors (73787675188185).

221363025564543 is an equidigital number, since it uses as much as digits as its factorization.

221363025564543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73787675188184.

The product of its (nonzero) digits is 15552000, while the sum is 51.

The spelling of 221363025564543 in words is "two hundred twenty-one trillion, three hundred sixty-three billion, twenty-five million, five hundred sixty-four thousand, five hundred forty-three".