51024247 has 4 divisors (see below), whose sum is σ = 51127000. Its totient is φ = 50921496.

The previous prime is 51024227. The next prime is 51024257. The reversal of 51024247 is 74242015.

51024247 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 51024247 - 2¹⁹ = 50499959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51024227) 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, 50628 + ... + 51625.

It is an arithmetic number, because the mean of its divisors is an integer number (12781750).

Almost surely, 2^51024247 is an apocalyptic number.

51024247 is a deficient number, since it is larger than the sum of its proper divisors (102753).

51024247 is a wasteful number, since it uses less digits than its factorization.

51024247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102752.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 51024247 is about 7143.1258563741. The cubic root of 51024247 is about 370.9017377439.

The spelling of 51024247 in words is "fifty-one million, twenty-four thousand, two hundred forty-seven".