221035144 has 32 divisors (see below), whose sum is σ = 458877600. Its totient is φ = 98968320.

The previous prime is 221035109. The next prime is 221035153. The reversal of 221035144 is 441530122.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 7 ways as a sum of consecutive naturals, for example, 12849 + ... + 24640.

It is an arithmetic number, because the mean of its divisors is an integer number (14339925).

Almost surely, 2^221035144 is an apocalyptic number.

It is an amenable number.

221035144 is an abundant number, since it is smaller than the sum of its proper divisors (237842456).

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

221035144 is a wasteful number, since it uses less digits than its factorization.

221035144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37573 (or 37569 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 221035144 is about 14867.2507209638. The cubic root of 221035144 is about 604.6264059632.

Adding to 221035144 its reverse (441530122), we get a palindrome (662565266).

The spelling of 221035144 in words is "two hundred twenty-one million, thirty-five thousand, one hundred forty-four".