221055512 has 32 divisors (see below), whose sum is σ = 422316720. Its totient is φ = 108451200.

The previous prime is 221055511. The next prime is 221055517. The reversal of 221055512 is 215550122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221055511) by changing a digit.

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, 169262 + ... + 170562.

Almost surely, 2^221055512 is an apocalyptic number.

It is an amenable number.

221055512 is a deficient number, since it is larger than the sum of its proper divisors (201261208).

221055512 is a wasteful number, since it uses less digits than its factorization.

221055512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691 (or 1687 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 221055512 is about 14867.9357006950. The cubic root of 221055512 is about 604.6449771463.

The spelling of 221055512 in words is "two hundred twenty-one million, fifty-five thousand, five hundred twelve".