221289046 has 16 divisors (see below), whose sum is σ = 362343168. Its totient is φ = 100521000.

The previous prime is 221289031. The next prime is 221289059. The reversal of 221289046 is 640982122.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 54151 + ... + 58093.

It is an arithmetic number, because the mean of its divisors is an integer number (22646448).

Almost surely, 2^221289046 is an apocalyptic number.

221289046 is a deficient number, since it is larger than the sum of its proper divisors (141054122).

221289046 is a wasteful number, since it uses less digits than its factorization.

221289046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6507.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 221289046 is about 14875.7872396724. The cubic root of 221289046 is about 604.8578278500.

The spelling of 221289046 in words is "two hundred twenty-one million, two hundred eighty-nine thousand, forty-six".