51317860 has 48 divisors (see below), whose sum is σ = 123762240. Its totient is φ = 17677440.

The previous prime is 51317839. The next prime is 51317867. The reversal of 51317860 is 6871315.

It is not an unprimeable number, because it can be changed into a prime (51317867) by changing a digit.

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, 1959 + ... + 10318.

It is an arithmetic number, because the mean of its divisors is an integer number (2578380).

Almost surely, 2^51317860 is an apocalyptic number.

It is an amenable number.

51317860 is an abundant number, since it is smaller than the sum of its proper divisors (72444380).

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

51317860 is a wasteful number, since it uses less digits than its factorization.

51317860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12316 (or 12314 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 51317860 is about 7163.6485117571. The cubic root of 51317860 is about 371.6118142041.

The spelling of 51317860 in words is "fifty-one million, three hundred seventeen thousand, eight hundred sixty".