221271884 has 6 divisors (see below), whose sum is σ = 387225804. Its totient is φ = 110635940.

The previous prime is 221271871. The next prime is 221271917. The reversal of 221271884 is 488172122.

It is a super-2 number, since 2×221271884² = 97922493297818912, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 27658982 + ... + 27658989.

It is an arithmetic number, because the mean of its divisors is an integer number (64537634).

Almost surely, 2^221271884 is an apocalyptic number.

It is an amenable number.

221271884 is a deficient number, since it is larger than the sum of its proper divisors (165953920).

221271884 is a wasteful number, since it uses less digits than its factorization.

221271884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55317975 (or 55317973 counting only the distinct ones).

The product of its digits is 14336, while the sum is 35.

The square root of 221271884 is about 14875.2103850668. The cubic root of 221271884 is about 604.8421909284.

The spelling of 221271884 in words is "two hundred twenty-one million, two hundred seventy-one thousand, eight hundred eighty-four".