221871914 has 8 divisors (see below), whose sum is σ = 363063168. Its totient is φ = 100850860.

The previous prime is 221871901. The next prime is 221871931. The reversal of 221871914 is 419178122.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5042522 + ... + 5042565.

It is an arithmetic number, because the mean of its divisors is an integer number (45382896).

Almost surely, 2^221871914 is an apocalyptic number.

221871914 is a deficient number, since it is larger than the sum of its proper divisors (141191254).

221871914 is a wasteful number, since it uses less digits than its factorization.

221871914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10085100.

The product of its digits is 8064, while the sum is 35.

The square root of 221871914 is about 14895.3655208592. The cubic root of 221871914 is about 605.3884207464.

The spelling of 221871914 in words is "two hundred twenty-one million, eight hundred seventy-one thousand, nine hundred fourteen".