51143418 has 12 divisors (see below), whose sum is σ = 110810778. Its totient is φ = 17047800.

The previous prime is 51143413. The next prime is 51143419. The reversal of 51143418 is 81434115.

It is a happy number.

51143418 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 44315649 + 6827769 = 6657^2 + 2613^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51143391 and 51143400.

It is not an unprimeable number, because it can be changed into a prime (51143413) 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 5 ways as a sum of consecutive naturals, for example, 1420633 + ... + 1420668.

Almost surely, 2^51143418 is an apocalyptic number.

51143418 is an abundant number, since it is smaller than the sum of its proper divisors (59667360).

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

51143418 is a wasteful number, since it uses less digits than its factorization.

51143418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2841309 (or 2841306 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 51143418 is about 7151.4626475987. The cubic root of 51143418 is about 371.1902696137.

The spelling of 51143418 in words is "fifty-one million, one hundred forty-three thousand, four hundred eighteen".