51016247 has 4 divisors (see below), whose sum is σ = 51405816. Its totient is φ = 50626680.

The previous prime is 51016243. The next prime is 51016261. The reversal of 51016247 is 74261015.

51016247 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 is a cyclic number.

It is not a de Polignac number, because 51016247 - 2² = 51016243 is a prime.

It is a super-3 number, since 3×51016247³ (a number of 24 digits) contains 333 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 (51016241) 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, 194588 + ... + 194849.

It is an arithmetic number, because the mean of its divisors is an integer number (12851454).

Almost surely, 2^51016247 is an apocalyptic number.

51016247 is a deficient number, since it is larger than the sum of its proper divisors (389569).

51016247 is a wasteful number, since it uses less digits than its factorization.

51016247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389568.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 51016247 is about 7142.5658554892. The cubic root of 51016247 is about 370.8823523917.

The spelling of 51016247 in words is "fifty-one million, sixteen thousand, two hundred forty-seven".