4551552221 has 8 divisors (see below), whose sum is σ = 4569253920. Its totient is φ = 4533869808.

The previous prime is 4551552211. The next prime is 4551552223. The reversal of 4551552221 is 1222551554.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4551552221 - 2¹⁰ = 4551551197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4551552223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619250 + ... + 626556.

It is an arithmetic number, because the mean of its divisors is an integer number (571156740).

Almost surely, 2^4551552221 is an apocalyptic number.

It is an amenable number.

4551552221 is a deficient number, since it is larger than the sum of its proper divisors (17701699).

4551552221 is a wasteful number, since it uses less digits than its factorization.

4551552221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9643.

The product of its digits is 20000, while the sum is 32.

The square root of 4551552221 is about 67465.1926625871. The cubic root of 4551552221 is about 1657.2442083852.

The spelling of 4551552221 in words is "four billion, five hundred fifty-one million, five hundred fifty-two thousand, two hundred twenty-one".