51317738 has 16 divisors (see below), whose sum is σ = 81297216. Its totient is φ = 24245760.

The previous prime is 51317729. The next prime is 51317743. The reversal of 51317738 is 83771315.

It is a junction number, because it is equal to n+sod(n) for n = 51317698 and 51317707.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2903 + ... + 10538.

It is an arithmetic number, because the mean of its divisors is an integer number (5081076).

Almost surely, 2^51317738 is an apocalyptic number.

51317738 is a deficient number, since it is larger than the sum of its proper divisors (29979478).

51317738 is a wasteful number, since it uses less digits than its factorization.

51317738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13549.

The product of its digits is 17640, while the sum is 35.

The square root of 51317738 is about 7163.6399965381. The cubic root of 51317738 is about 371.6115197213.

The spelling of 51317738 in words is "fifty-one million, three hundred seventeen thousand, seven hundred thirty-eight".