51082218 has 64 divisors (see below), whose sum is σ = 129254400. Its totient is φ = 14802480.

The previous prime is 51082211. The next prime is 51082219. The reversal of 51082218 is 81228015.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 51082191 and 51082200.

It is not an unprimeable number, because it can be changed into a prime (51082211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11793 + ... + 15531.

It is an arithmetic number, because the mean of its divisors is an integer number (2019600).

Almost surely, 2^51082218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51082218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64627200).

51082218 is an abundant number, since it is smaller than the sum of its proper divisors (78172182).

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

51082218 is a wasteful number, since it uses less digits than its factorization.

51082218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784 (or 3778 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 51082218 is about 7147.1825218054. The cubic root of 51082218 is about 371.0421507702.

It can be divided in two parts, 510 and 82218, that added together give a palindrome (82728).

The spelling of 51082218 in words is "fifty-one million, eighty-two thousand, two hundred eighteen".