4251220544 has 14 divisors (see below), whose sum is σ = 8436015894. Its totient is φ = 2125610240.

The previous prime is 4251220543. The next prime is 4251220553. The reversal of 4251220544 is 4450221524.

4251220544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3661702144 + 589518400 = 60512^2 + 24280^2 .

It is a super-2 number, since 2×4251220544² = 36145752227455311872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4251220541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33212597 + ... + 33212724.

Almost surely, 2^4251220544 is an apocalyptic number.

It is an amenable number.

4251220544 is a deficient number, since it is larger than the sum of its proper divisors (4184795350).

4251220544 is an equidigital number, since it uses as much as digits as its factorization.

4251220544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66425333 (or 66425323 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 4251220544 is about 65201.3845251771. The cubic root of 4251220544 is about 1619.9609481009.

The spelling of 4251220544 in words is "four billion, two hundred fifty-one million, two hundred twenty thousand, five hundred forty-four".