51317900 has 36 divisors (see below), whose sum is σ = 117914328. Its totient is φ = 19319040.

The previous prime is 51317891. The next prime is 51317911. The reversal of 51317900 is 971315.

It is a self number, because there is not a number n which added to its sum of digits gives 51317900.

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, 13394 + ... + 16793.

It is an arithmetic number, because the mean of its divisors is an integer number (3275398).

Almost surely, 2^51317900 is an apocalyptic number.

51317900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51317900 is an abundant number, since it is smaller than the sum of its proper divisors (66596428).

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

51317900 is a wasteful number, since it uses less digits than its factorization.

51317900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30218 (or 30211 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 51317900 is about 7163.6513036300. The cubic root of 51317900 is about 371.6119107557.

It can be divided in two parts, 5131 and 7900, that added together give a palindrome (13031).

The spelling of 51317900 in words is "fifty-one million, three hundred seventeen thousand, nine hundred".