51811118 has 4 divisors (see below), whose sum is σ = 77716680. Its totient is φ = 25905558.

The previous prime is 51811103. The next prime is 51811127. The reversal of 51811118 is 81111815.

51811118 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12952778 + ... + 12952781.

It is an arithmetic number, because the mean of its divisors is an integer number (19429170).

Almost surely, 2^51811118 is an apocalyptic number.

51811118 is a deficient number, since it is larger than the sum of its proper divisors (25905562).

51811118 is a wasteful number, since it uses less digits than its factorization.

51811118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25905561.

The product of its digits is 320, while the sum is 26.

The square root of 51811118 is about 7197.9940261159. The cubic root of 51811118 is about 372.7986416398.

The spelling of 51811118 in words is "fifty-one million, eight hundred eleven thousand, one hundred eighteen".