4221544365 has 16 divisors (see below), whose sum is σ = 7504968000. Its totient is φ = 2251490256.

The previous prime is 4221544351. The next prime is 4221544421. The reversal of 4221544365 is 5634451224.

4221544365 is a `hidden beast` number, since 4 + 2 + 215 + 4 + 436 + 5 = 666.

It is not a de Polignac number, because 4221544365 - 2⁸ = 4221544109 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15635215 + ... + 15635484.

It is an arithmetic number, because the mean of its divisors is an integer number (469060500).

Almost surely, 2^4221544365 is an apocalyptic number.

4221544365 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4221544365 is a deficient number, since it is larger than the sum of its proper divisors (3283423635).

4221544365 is a wasteful number, since it uses less digits than its factorization.

4221544365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31270713 (or 31270707 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The square root of 4221544365 is about 64973.4127547568. The cubic root of 4221544365 is about 1616.1826959339.

Adding to 4221544365 its reverse (5634451224), we get a palindrome (9855995589).

The spelling of 4221544365 in words is "four billion, two hundred twenty-one million, five hundred forty-four thousand, three hundred sixty-five".