51757385 has 8 divisors (see below), whose sum is σ = 62526600. Its totient is φ = 41127424.

The previous prime is 51757379. The next prime is 51757399. The reversal of 51757385 is 58375715.

It can be written as a sum of positive squares in 4 ways, for example, as 1006009 + 50751376 = 1003^2 + 7124^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51757385 - 2⁴ = 51757369 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33992 + ... + 35481.

It is an arithmetic number, because the mean of its divisors is an integer number (7815825).

Almost surely, 2^51757385 is an apocalyptic number.

It is an amenable number.

51757385 is a deficient number, since it is larger than the sum of its proper divisors (10769215).

51757385 is a wasteful number, since it uses less digits than its factorization.

51757385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69627.

The product of its digits is 147000, while the sum is 41.

The square root of 51757385 is about 7194.2605596406. The cubic root of 51757385 is about 372.6697213162.

The spelling of 51757385 in words is "fifty-one million, seven hundred fifty-seven thousand, three hundred eighty-five".