221002242 has 8 divisors (see below), whose sum is σ = 442004496. Its totient is φ = 73667412.

The previous prime is 221002231. The next prime is 221002273. The reversal of 221002242 is 242200122.

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

221002242 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18416848 + ... + 18416859.

It is an arithmetic number, because the mean of its divisors is an integer number (55250562).

Almost surely, 2^221002242 is an apocalyptic number.

221002242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221002242 is a wasteful number, since it uses less digits than its factorization.

221002242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36833712.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 221002242 is about 14866.1441537475. The cubic root of 221002242 is about 604.5964040899.

Adding to 221002242 its reverse (242200122), we get a palindrome (463202364).

It can be divided in two parts, 22100 and 2242, that added together give a palindrome (24342).

The spelling of 221002242 in words is "two hundred twenty-one million, two thousand, two hundred forty-two".