221464424 has 16 divisors (see below), whose sum is σ = 433300320. Its totient is φ = 105917680.

The previous prime is 221464421. The next prime is 221464433. The reversal of 221464424 is 424464122.

221464424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221464421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601622 + ... + 601989.

It is an arithmetic number, because the mean of its divisors is an integer number (27081270).

Almost surely, 2^221464424 is an apocalyptic number.

It is an amenable number.

221464424 is a deficient number, since it is larger than the sum of its proper divisors (211835896).

221464424 is a wasteful number, since it uses less digits than its factorization.

221464424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203640 (or 1203636 counting only the distinct ones).

The product of its digits is 12288, while the sum is 29.

The square root of 221464424 is about 14881.6808190473. The cubic root of 221464424 is about 605.0175747917.

The spelling of 221464424 in words is "two hundred twenty-one million, four hundred sixty-four thousand, four hundred twenty-four".