51618366 has 24 divisors (see below), whose sum is σ = 112216104. Its totient is φ = 17148240.

The previous prime is 51618353. The next prime is 51618397. The reversal of 51618366 is 66381615.

It is a happy number.

51618366 is a `hidden beast` number, since 5 + 1 + 618 + 36 + 6 = 666.

51618366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51618366.

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 in 11 ways as a sum of consecutive naturals, for example, 856 + ... + 10196.

It is an arithmetic number, because the mean of its divisors is an integer number (4675671).

Almost surely, 2^51618366 is an apocalyptic number.

51618366 is an abundant number, since it is smaller than the sum of its proper divisors (60597738).

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

51618366 is a wasteful number, since it uses less digits than its factorization.

51618366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9656 (or 9653 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 51618366 is about 7184.5922640050. The cubic root of 51618366 is about 372.3357617182.

It can be divided in two parts, 51618 and 366, that added together give a square (51984 = 228²).

The spelling of 51618366 in words is "fifty-one million, six hundred eighteen thousand, three hundred sixty-six".