51317138 has 32 divisors (see below), whose sum is σ = 84326400. Its totient is φ = 23339664.

The previous prime is 51317129. The next prime is 51317179. The reversal of 51317138 is 83171315.

It is a super-2 number, since 2×51317138² = 5266897305022088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51317138.

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 15 ways as a sum of consecutive naturals, for example, 105131 + ... + 105617.

It is an arithmetic number, because the mean of its divisors is an integer number (2635200).

Almost surely, 2^51317138 is an apocalyptic number.

51317138 is a deficient number, since it is larger than the sum of its proper divisors (33009262).

51317138 is a wasteful number, since it uses less digits than its factorization.

51317138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614.

The product of its digits is 2520, while the sum is 29.

The square root of 51317138 is about 7163.5981182643. The cubic root of 51317138 is about 371.6100714386.

The spelling of 51317138 in words is "fifty-one million, three hundred seventeen thousand, one hundred thirty-eight".