51748987 has 2 divisors, whose sum is σ = 51748988. Its totient is φ = 51748986.

The previous prime is 51748973. The next prime is 51748993. The reversal of 51748987 is 78984715.

51748987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51748987 - 2¹⁵ = 51716219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51748987.

It is not a weakly prime, because it can be changed into another prime (51748937) 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 as a sum of consecutive naturals, namely, 25874493 + 25874494.

It is an arithmetic number, because the mean of its divisors is an integer number (25874494).

Almost surely, 2^51748987 is an apocalyptic number.

51748987 is a deficient number, since it is larger than the sum of its proper divisors (1).

51748987 is an equidigital number, since it uses as much as digits as its factorization.

51748987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 49.

The square root of 51748987 is about 7193.6768762574. The cubic root of 51748987 is about 372.6495641309.

It can be divided in two parts, 5174 and 8987, that added together give a square (14161 = 119²).

The spelling of 51748987 in words is "fifty-one million, seven hundred forty-eight thousand, nine hundred eighty-seven".