221312144543 has 8 divisors (see below), whose sum is σ = 253828267680. Its totient is φ = 189021047040.

The previous prime is 221312144539. The next prime is 221312144567. The reversal of 221312144543 is 345441213122.

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

It is not a de Polignac number, because 221312144543 - 2² = 221312144539 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 (221312144513) 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, 56254298 + ... + 56258231.

It is an arithmetic number, because the mean of its divisors is an integer number (31728533460).

Almost surely, 2^221312144543 is an apocalyptic number.

221312144543 is a deficient number, since it is larger than the sum of its proper divisors (32516123137).

221312144543 is a wasteful number, since it uses less digits than its factorization.

221312144543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112512817.

The product of its digits is 23040, while the sum is 32.

Adding to 221312144543 its reverse (345441213122), we get a palindrome (566753357665).

The spelling of 221312144543 in words is "two hundred twenty-one billion, three hundred twelve million, one hundred forty-four thousand, five hundred forty-three".