221342239 has 8 divisors (see below), whose sum is σ = 229516560. Its totient is φ = 213204096.

The previous prime is 221342203. The next prime is 221342299. The reversal of 221342239 is 932243122.

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 221342239 - 2⁷ = 221342111 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 (221342299) 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, 3744 + ... + 21370.

It is an arithmetic number, because the mean of its divisors is an integer number (28689570).

Almost surely, 2^221342239 is an apocalyptic number.

221342239 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

221342239 is a deficient number, since it is larger than the sum of its proper divisors (8174321).

221342239 is a wasteful number, since it uses less digits than its factorization.

221342239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18089.

The product of its digits is 5184, while the sum is 28.

The square root of 221342239 is about 14877.5750376195. The cubic root of 221342239 is about 604.9062887889.

The spelling of 221342239 in words is "two hundred twenty-one million, three hundred forty-two thousand, two hundred thirty-nine".