51317798 has 24 divisors (see below), whose sum is σ = 94814712. Its totient is φ = 20698944.

The previous prime is 51317789. The next prime is 51317839. The reversal of 51317798 is 89771315.

It is a Curzon number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 13736 + ... + 17067.

It is an arithmetic number, because the mean of its divisors is an integer number (3950613).

Almost surely, 2^51317798 is an apocalyptic number.

51317798 is a deficient number, since it is larger than the sum of its proper divisors (43496914).

51317798 is a wasteful number, since it uses less digits than its factorization.

51317798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30836 (or 30829 counting only the distinct ones).

The product of its digits is 52920, while the sum is 41.

The square root of 51317798 is about 7163.6441843520. The cubic root of 51317798 is about 371.6116645490.

The spelling of 51317798 in words is "fifty-one million, three hundred seventeen thousand, seven hundred ninety-eight".