4251224521 has 8 divisors (see below), whose sum is σ = 4629283200. Its totient is φ = 3888596880.

The previous prime is 4251224519. The next prime is 4251224533. The reversal of 4251224521 is 1254221524.

It is a happy number.

4251224521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 4251224521 - 2¹ = 4251224519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4251224521.

It is not an unprimeable number, because it can be changed into a prime (4251224581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3857185 + ... + 3858286.

It is an arithmetic number, because the mean of its divisors is an integer number (578660400).

Almost surely, 2^4251224521 is an apocalyptic number.

It is an amenable number.

4251224521 is a deficient number, since it is larger than the sum of its proper divisors (378058679).

4251224521 is a wasteful number, since it uses less digits than its factorization.

4251224521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7715519.

The product of its digits is 6400, while the sum is 28.

The square root of 4251224521 is about 65201.4150229886. The cubic root of 4251224521 is about 1619.9614532565.

The spelling of 4251224521 in words is "four billion, two hundred fifty-one million, two hundred twenty-four thousand, five hundred twenty-one".