51745851 has 32 divisors (see below), whose sum is σ = 79779840. Its totient is φ = 33112800.

The previous prime is 51745849. The next prime is 51745853. The reversal of 51745851 is 15854715.

51745851 is a `hidden beast` number, since 5 + 1 + 74 + 585 + 1 = 666.

51745851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51745849) and next prime (51745853).

It is not a de Polignac number, because 51745851 - 2¹ = 51745849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51745853) 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 31 ways as a sum of consecutive naturals, for example, 176461 + ... + 176753.

It is an arithmetic number, because the mean of its divisors is an integer number (2493120).

Almost surely, 2^51745851 is an apocalyptic number.

51745851 is a deficient number, since it is larger than the sum of its proper divisors (28033989).

51745851 is a wasteful number, since it uses less digits than its factorization.

51745851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 538 counting only the distinct ones).

The product of its digits is 28000, while the sum is 36.

The square root of 51745851 is about 7193.4589037542. The cubic root of 51745851 is about 372.6420364303.

It can be divided in two parts, 5174 and 5851, that added together give a square (11025 = 105²).

The spelling of 51745851 in words is "fifty-one million, seven hundred forty-five thousand, eight hundred fifty-one".