221550242 has 8 divisors (see below), whose sum is σ = 343045632. Its totient is φ = 107201700.

The previous prime is 221550221. The next prime is 221550247. The reversal of 221550242 is 242055122.

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

It is not an unprimeable number, because it can be changed into a prime (221550247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1786634 + ... + 1786757.

It is an arithmetic number, because the mean of its divisors is an integer number (42880704).

Almost surely, 2^221550242 is an apocalyptic number.

221550242 is a deficient number, since it is larger than the sum of its proper divisors (121495390).

221550242 is a wasteful number, since it uses less digits than its factorization.

221550242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3573424.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 221550242 is about 14884.5638834331. The cubic root of 221550242 is about 605.0957132908.

The spelling of 221550242 in words is "two hundred twenty-one million, five hundred fifty thousand, two hundred forty-two".