221656424304543 has 8 divisors (see below), whose sum is σ = 296001528778368. Its totient is φ = 147541134683544.

The previous prime is 221656424304529. The next prime is 221656424304587. The reversal of 221656424304543 is 345403424656122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221656424304543 - 2¹⁸ = 221656424042399 is a prime.

It is a super-2 number, since 2×221656424304543² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221656424344543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57453710955 + ... + 57453714812.

It is an arithmetic number, because the mean of its divisors is an integer number (37000191097296).

Almost surely, 2^{221656424304543} is an apocalyptic number.

221656424304543 is a deficient number, since it is larger than the sum of its proper divisors (74345104473825).

221656424304543 is a wasteful number, since it uses less digits than its factorization.

221656424304543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114907426413.

The product of its (nonzero) digits is 16588800, while the sum is 51.

The spelling of 221656424304543 in words is "two hundred twenty-one trillion, six hundred fifty-six billion, four hundred twenty-four million, three hundred four thousand, five hundred forty-three".