221723984 has 10 divisors (see below), whose sum is σ = 429590250. Its totient is φ = 110861984.

The previous prime is 221723969. The next prime is 221723989. The reversal of 221723984 is 489327122.

It can be written as a sum of positive squares in only one way, i.e., 221176384 + 547600 = 14872^2 + 740^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221723989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6928859 + ... + 6928890.

It is an arithmetic number, because the mean of its divisors is an integer number (42959025).

Almost surely, 2^221723984 is an apocalyptic number.

It is an amenable number.

221723984 is a deficient number, since it is larger than the sum of its proper divisors (207866266).

221723984 is a wasteful number, since it uses less digits than its factorization.

221723984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13857757 (or 13857751 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 221723984 is about 14890.3990544243. The cubic root of 221723984 is about 605.2538460752.

The spelling of 221723984 in words is "two hundred twenty-one million, seven hundred twenty-three thousand, nine hundred eighty-four".