221742363 has 8 divisors (see below), whose sum is σ = 295751248. Its totient is φ = 147780864.

The previous prime is 221742361. The next prime is 221742431. The reversal of 221742363 is 363247122.

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

It is not a de Polignac number, because 221742363 - 2¹ = 221742361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221742363.

It is not an unprimeable number, because it can be changed into a prime (221742361) 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, 1095 + ... + 21087.

It is an arithmetic number, because the mean of its divisors is an integer number (36968906).

Almost surely, 2^221742363 is an apocalyptic number.

221742363 is a deficient number, since it is larger than the sum of its proper divisors (74008885).

221742363 is a wasteful number, since it uses less digits than its factorization.

221742363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23693.

The product of its digits is 12096, while the sum is 30.

The square root of 221742363 is about 14891.0161842636. The cubic root of 221742363 is about 605.2705690489.

Adding to 221742363 its reverse (363247122), we get a palindrome (584989485).

The spelling of 221742363 in words is "two hundred twenty-one million, seven hundred forty-two thousand, three hundred sixty-three".