51317538 has 8 divisors (see below), whose sum is σ = 102635088. Its totient is φ = 17105844.

The previous prime is 51317507. The next prime is 51317573. The reversal of 51317538 is 83571315.

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

51317538 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 51317499 and 51317508.

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 3 ways as a sum of consecutive naturals, for example, 4276456 + ... + 4276467.

It is an arithmetic number, because the mean of its divisors is an integer number (12829386).

Almost surely, 2^51317538 is an apocalyptic number.

51317538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51317538 is a wasteful number, since it uses less digits than its factorization.

51317538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8552928.

The product of its digits is 12600, while the sum is 33.

The square root of 51317538 is about 7163.6260371407. The cubic root of 51317538 is about 371.6110369616.

The spelling of 51317538 in words is "fifty-one million, three hundred seventeen thousand, five hundred thirty-eight".