51982218 has 24 divisors (see below), whose sum is σ = 114311808. Its totient is φ = 17068392.

The previous prime is 51982211. The next prime is 51982223. The reversal of 51982218 is 81228915.

51982218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51982211) 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 11 ways as a sum of consecutive naturals, for example, 20346 + ... + 22757.

It is an arithmetic number, because the mean of its divisors is an integer number (4762992).

Almost surely, 2^51982218 is an apocalyptic number.

51982218 is an abundant number, since it is smaller than the sum of its proper divisors (62329590).

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

51982218 is a wasteful number, since it uses less digits than its factorization.

51982218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43178 (or 43175 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 51982218 is about 7209.8694856426. The cubic root of 51982218 is about 373.2085649892.

The spelling of 51982218 in words is "fifty-one million, nine hundred eighty-two thousand, two hundred eighteen".