51258618 has 48 divisors (see below), whose sum is σ = 118703520. Its totient is φ = 15938208.

The previous prime is 51258617. The next prime is 51258659. The reversal of 51258618 is 81685215.

51258618 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 (51258617) 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 23 ways as a sum of consecutive naturals, for example, 21796 + ... + 24032.

It is an arithmetic number, because the mean of its divisors is an integer number (2472990).

Almost surely, 2^51258618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51258618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59351760).

51258618 is an abundant number, since it is smaller than the sum of its proper divisors (67444902).

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

51258618 is a wasteful number, since it uses less digits than its factorization.

51258618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331 (or 2328 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 51258618 is about 7159.5124135656. The cubic root of 51258618 is about 371.4687613175.

The spelling of 51258618 in words is "fifty-one million, two hundred fifty-eight thousand, six hundred eighteen".