221153460 has 48 divisors (see below), whose sum is σ = 675525312. Its totient is φ = 53612800.

The previous prime is 221153447. The next prime is 221153503. The reversal of 221153460 is 64351122.

221153460 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221153460.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 166881 + ... + 168200.

It is an arithmetic number, because the mean of its divisors is an integer number (14073444).

Almost surely, 2^221153460 is an apocalyptic number.

221153460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221153460 is an abundant number, since it is smaller than the sum of its proper divisors (454371852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221153460 is a wasteful number, since it uses less digits than its factorization.

221153460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335104 (or 335102 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 221153460 is about 14871.2292699696. The cubic root of 221153460 is about 604.7342684750.

The spelling of 221153460 in words is "two hundred twenty-one million, one hundred fifty-three thousand, four hundred sixty".