221153320 has 32 divisors (see below), whose sum is σ = 499972320. Its totient is φ = 88038720.

The previous prime is 221153297. The next prime is 221153353. The reversal of 221153320 is 23351122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4662 + ... + 21541.

It is an arithmetic number, because the mean of its divisors is an integer number (15624135).

Almost surely, 2^221153320 is an apocalyptic number.

221153320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221153320 is an abundant number, since it is smaller than the sum of its proper divisors (278819000).

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

221153320 is a wasteful number, since it uses less digits than its factorization.

221153320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26425 (or 26421 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 221153320 is about 14871.2245628933. The cubic root of 221153320 is about 604.7341408671.

The spelling of 221153320 in words is "two hundred twenty-one million, one hundred fifty-three thousand, three hundred twenty".