51318878 has 24 divisors (see below), whose sum is σ = 83997000. Its totient is φ = 23503584.

The previous prime is 51318859. The next prime is 51318881. The reversal of 51318878 is 87881315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49853 + ... + 50871.

It is an arithmetic number, because the mean of its divisors is an integer number (3499875).

Almost surely, 2^51318878 is an apocalyptic number.

51318878 is a deficient number, since it is larger than the sum of its proper divisors (32678122).

51318878 is a wasteful number, since it uses less digits than its factorization.

51318878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196 (or 1183 counting only the distinct ones).

The product of its digits is 53760, while the sum is 41.

The square root of 51318878 is about 7163.7195645838. The cubic root of 51318878 is about 371.6142714274.

It can be divided in two parts, 513 and 18878, that added together give a palindrome (19391).

The spelling of 51318878 in words is "fifty-one million, three hundred eighteen thousand, eight hundred seventy-eight".