221342143 has 8 divisors (see below), whose sum is σ = 241637760. Its totient is φ = 201075480.

The previous prime is 221342141. The next prime is 221342203. The reversal of 221342143 is 341243122.

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

It is a cyclic number.

It is not a de Polignac number, because 221342143 - 2¹ = 221342141 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 (221342141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10696 + ... + 23602.

It is an arithmetic number, because the mean of its divisors is an integer number (30204720).

Almost surely, 2^221342143 is an apocalyptic number.

221342143 is a deficient number, since it is larger than the sum of its proper divisors (20295617).

221342143 is a wasteful number, since it uses less digits than its factorization.

221342143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14477.

The product of its digits is 1152, while the sum is 22.

The square root of 221342143 is about 14877.5718112869. The cubic root of 221342143 is about 604.9062013361.

Adding to 221342143 its reverse (341243122), we get a palindrome (562585265).

The spelling of 221342143 in words is "two hundred twenty-one million, three hundred forty-two thousand, one hundred forty-three".