221240343 has 8 divisors (see below), whose sum is σ = 295206256. Its totient is φ = 147384000.

The previous prime is 221240317. The next prime is 221240377. The reversal of 221240343 is 343042122.

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

It is not a de Polignac number, because 221240343 - 2¹⁷ = 221109271 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 (221240143) 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, 22558 + ... + 30843.

It is an arithmetic number, because the mean of its divisors is an integer number (36900782).

Almost surely, 2^221240343 is an apocalyptic number.

221240343 is a deficient number, since it is larger than the sum of its proper divisors (73965913).

221240343 is a wasteful number, since it uses less digits than its factorization.

221240343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54785.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 221240343 is about 14874.1501605974. The cubic root of 221240343 is about 604.8134506689.

Adding to 221240343 its reverse (343042122), we get a palindrome (564282465).

The spelling of 221240343 in words is "two hundred twenty-one million, two hundred forty thousand, three hundred forty-three".