51518768 has 40 divisors (see below), whose sum is σ = 116516352. Its totient is φ = 21607488.

The previous prime is 51518767. The next prime is 51518783. The reversal of 51518768 is 86781515.

It is not an unprimeable number, because it can be changed into a prime (51518767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371 + ... + 10157.

Almost surely, 2^51518768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51518768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58258176).

51518768 is an abundant number, since it is smaller than the sum of its proper divisors (64997584).

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

51518768 is a wasteful number, since it uses less digits than its factorization.

51518768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9849 (or 9843 counting only the distinct ones).

The product of its digits is 67200, while the sum is 41.

The square root of 51518768 is about 7177.6575566127. The cubic root of 51518768 is about 372.0961327071.

The spelling of 51518768 in words is "fifty-one million, five hundred eighteen thousand, seven hundred sixty-eight".