221969224 has 32 divisors (see below), whose sum is σ = 422845920. Its totient is φ = 109221376.

The previous prime is 221969213. The next prime is 221969233. The reversal of 221969224 is 422969122.

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, 233919 + ... + 234865.

It is an arithmetic number, because the mean of its divisors is an integer number (13213935).

Almost surely, 2^221969224 is an apocalyptic number.

It is an amenable number.

221969224 is a deficient number, since it is larger than the sum of its proper divisors (200876696).

221969224 is a wasteful number, since it uses less digits than its factorization.

221969224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389 (or 1385 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 221969224 is about 14898.6316150175. The cubic root of 221969224 is about 605.4769128496.

The spelling of 221969224 in words is "two hundred twenty-one million, nine hundred sixty-nine thousand, two hundred twenty-four".