221471672 has 32 divisors (see below), whose sum is σ = 426074880. Its totient is φ = 107866080.

The previous prime is 221471651. The next prime is 221471693. The reversal of 221471672 is 276174122.

221471672 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221471651) and next prime (221471693).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179297 + ... + 180527.

It is an arithmetic number, because the mean of its divisors is an integer number (13314840).

Almost surely, 2^221471672 is an apocalyptic number.

It is an amenable number.

221471672 is a deficient number, since it is larger than the sum of its proper divisors (204603208).

221471672 is a wasteful number, since it uses less digits than its factorization.

221471672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803 (or 1799 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 221471672 is about 14881.9243379343. The cubic root of 221471672 is about 605.0241749783.

The spelling of 221471672 in words is "two hundred twenty-one million, four hundred seventy-one thousand, six hundred seventy-two".