51016549 has 4 divisors (see below), whose sum is σ = 51096780. Its totient is φ = 50936320.

The previous prime is 51016543. The next prime is 51016571. The reversal of 51016549 is 94561015.

51016549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29920900 + 21095649 = 5470^2 + 4593^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51016549 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 51016549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51016543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39154 + ... + 40435.

It is an arithmetic number, because the mean of its divisors is an integer number (12774195).

Almost surely, 2^51016549 is an apocalyptic number.

It is an amenable number.

51016549 is a deficient number, since it is larger than the sum of its proper divisors (80231).

51016549 is an equidigital number, since it uses as much as digits as its factorization.

51016549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80230.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 51016549 is about 7142.5869963200. The cubic root of 51016549 is about 370.8830842256.

The spelling of 51016549 in words is "fifty-one million, sixteen thousand, five hundred forty-nine".