221520441252343 has 4 divisors (see below), whose sum is σ = 221532657695848. Its totient is φ = 221508224808840.

The previous prime is 221520441252277. The next prime is 221520441252403. The reversal of 221520441252343 is 343252144025122.

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 221520441252343 - 2⁴⁵ = 186336069163511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221520441252296 and 221520441252305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221520441252043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6108194553 + ... + 6108230818.

It is an arithmetic number, because the mean of its divisors is an integer number (55383164423962).

Almost surely, 2^{221520441252343} is an apocalyptic number.

221520441252343 is a deficient number, since it is larger than the sum of its proper divisors (12216443505).

221520441252343 is a wasteful number, since it uses less digits than its factorization.

221520441252343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12216443504.

The product of its (nonzero) digits is 460800, while the sum is 40.

Adding to 221520441252343 its reverse (343252144025122), we get a palindrome (564772585277465).

The spelling of 221520441252343 in words is "two hundred twenty-one trillion, five hundred twenty billion, four hundred forty-one million, two hundred fifty-two thousand, three hundred forty-three".