6251220549 has 16 divisors (see below), whose sum is σ = 10584077440. Its totient is φ = 3572125920.

The previous prime is 6251220529. The next prime is 6251220601. The reversal of 6251220549 is 9450221526.

6251220549 is a `hidden beast` number, since 62 + 51 + 2 + 2 + 0 + 549 = 666.

6251220549 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6251220549 - 2⁷ = 6251220421 is a prime.

It is a super-2 number, since 2×6251220549² = 78155516704479722802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6251220509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16537432 + ... + 16537809.

It is an arithmetic number, because the mean of its divisors is an integer number (661504840).

Almost surely, 2^6251220549 is an apocalyptic number.

It is an amenable number.

6251220549 is a deficient number, since it is larger than the sum of its proper divisors (4332856891).

6251220549 is a wasteful number, since it uses less digits than its factorization.

6251220549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33075257 (or 33075251 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 6251220549 is about 79064.6605570403. The cubic root of 6251220549 is about 1842.1356492745.

The spelling of 6251220549 in words is "six billion, two hundred fifty-one million, two hundred twenty thousand, five hundred forty-nine".