221647604477223 has 4 divisors (see below), whose sum is σ = 295530139302968. Its totient is φ = 147765069651480.

The previous prime is 221647604477219. The next prime is 221647604477239. The reversal of 221647604477223 is 322774406746122.

It is a happy number.

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

It is not a de Polignac number, because 221647604477223 - 2² = 221647604477219 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 (221647604477623) 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, 36941267412868 + ... + 36941267412873.

It is an arithmetic number, because the mean of its divisors is an integer number (73882534825742).

Almost surely, 2^{221647604477223} is an apocalyptic number.

221647604477223 is a deficient number, since it is larger than the sum of its proper divisors (73882534825745).

221647604477223 is an equidigital number, since it uses as much as digits as its factorization.

221647604477223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73882534825744.

The product of its (nonzero) digits is 37933056, while the sum is 57.

The spelling of 221647604477223 in words is "two hundred twenty-one trillion, six hundred forty-seven billion, six hundred four million, four hundred seventy-seven thousand, two hundred twenty-three".