51042618 has 24 divisors (see below), whose sum is σ = 120646656. Its totient is φ = 15467400.

The previous prime is 51042617. The next prime is 51042631. The reversal of 51042618 is 81624015.

51042618 is a `hidden beast` number, since 5 + 1 + 0 + 42 + 618 = 666.

51042618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51042591 and 51042600.

It is not an unprimeable number, because it can be changed into a prime (51042613) 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, 128698 + ... + 129093.

It is an arithmetic number, because the mean of its divisors is an integer number (5026944).

Almost surely, 2^51042618 is an apocalyptic number.

51042618 is an abundant number, since it is smaller than the sum of its proper divisors (69604038).

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

51042618 is a wasteful number, since it uses less digits than its factorization.

51042618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257810 (or 257807 counting only the distinct ones).

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

The square root of 51042618 is about 7144.4116622714. The cubic root of 51042618 is about 370.9462461141.

The spelling of 51042618 in words is "fifty-one million, forty-two thousand, six hundred eighteen".