223456613727221 has 4 divisors (see below), whose sum is σ = 255378987116832. Its totient is φ = 191534240337612.

The previous prime is 223456613727211. The next prime is 223456613727227. The reversal of 223456613727221 is 122727316654322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223456613727221 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 (223456613727227) 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, 15961186694795 + ... + 15961186694808.

It is an arithmetic number, because the mean of its divisors is an integer number (63844746779208).

Almost surely, 2^{223456613727221} is an apocalyptic number.

It is an amenable number.

223456613727221 is a deficient number, since it is larger than the sum of its proper divisors (31922373389611).

223456613727221 is an equidigital number, since it uses as much as digits as its factorization.

223456613727221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31922373389610.

The product of its digits is 10160640, while the sum is 53.

The spelling of 223456613727221 in words is "two hundred twenty-three trillion, four hundred fifty-six billion, six hundred thirteen million, seven hundred twenty-seven thousand, two hundred twenty-one".