221888143 has 2 divisors, whose sum is σ = 221888144. Its totient is φ = 221888142.

The previous prime is 221888141. The next prime is 221888197. The reversal of 221888143 is 341888122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221888143 - 2¹ = 221888141 is a prime.

Together with 221888141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221888141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110944071 + 110944072.

It is an arithmetic number, because the mean of its divisors is an integer number (110944072).

Almost surely, 2^221888143 is an apocalyptic number.

221888143 is a deficient number, since it is larger than the sum of its proper divisors (1).

221888143 is an equidigital number, since it uses as much as digits as its factorization.

221888143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24576, while the sum is 37.

The square root of 221888143 is about 14895.9102776568. The cubic root of 221888143 is about 605.4031809279.

The spelling of 221888143 in words is "two hundred twenty-one million, eight hundred eighty-eight thousand, one hundred forty-three".