51818160 has 40 divisors (see below), whose sum is σ = 160637040. Its totient is φ = 13818112.

The previous prime is 51818141. The next prime is 51818161. The reversal of 51818160 is 6181815.

It is a happy number.

51818160 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (51818161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107715 + ... + 108194.

It is an arithmetic number, because the mean of its divisors is an integer number (4015926).

Almost surely, 2^51818160 is an apocalyptic number.

It is an amenable number.

51818160 is an abundant number, since it is smaller than the sum of its proper divisors (108818880).

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

51818160 is a wasteful number, since it uses less digits than its factorization.

51818160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215925 (or 215919 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 51818160 is about 7198.4831735582. The cubic root of 51818160 is about 372.8155307375.

Adding to 51818160 its reverse (6181815), we get a palindrome (57999975).

The spelling of 51818160 in words is "fifty-one million, eight hundred eighteen thousand, one hundred sixty".