221163144 has 32 divisors (see below), whose sum is σ = 553629120. Its totient is φ = 73624896.

The previous prime is 221163121. The next prime is 221163157. The reversal of 221163144 is 441361122.

221163144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

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, 14154 + ... + 25350.

It is an arithmetic number, because the mean of its divisors is an integer number (17300910).

Almost surely, 2^221163144 is an apocalyptic number.

221163144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221163144 is an abundant number, since it is smaller than the sum of its proper divisors (332465976).

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

221163144 is a wasteful number, since it uses less digits than its factorization.

221163144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12029 (or 12025 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 221163144 is about 14871.5548615469. The cubic root of 221163144 is about 604.7430951682.

The spelling of 221163144 in words is "two hundred twenty-one million, one hundred sixty-three thousand, one hundred forty-four".