4221555044 has 12 divisors (see below), whose sum is σ = 8443110144. Its totient is φ = 1809237864.

The previous prime is 4221555031. The next prime is 4221555049. The reversal of 4221555044 is 4405551224.

4221555044 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 4221555044.

It is not an unprimeable number, because it can be changed into a prime (4221555049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75384884 + ... + 75384939.

It is an arithmetic number, because the mean of its divisors is an integer number (703592512).

Almost surely, 2^4221555044 is an apocalyptic number.

It is an amenable number.

4221555044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

4221555044 is a wasteful number, since it uses less digits than its factorization.

4221555044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150769834 (or 150769832 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

The square root of 4221555044 is about 64973.4949344731. The cubic root of 4221555044 is about 1616.1840587211.

The spelling of 4221555044 in words is "four billion, two hundred twenty-one million, five hundred fifty-five thousand, forty-four".