51565042 has 8 divisors (see below), whose sum is σ = 77398236. Its totient is φ = 25765632.

The previous prime is 51565001. The next prime is 51565043. The reversal of 51565042 is 24056515.

51565042 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 2 ways, for example, as 34000561 + 17564481 = 5831^2 + 4191^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51565042.

It is not an unprimeable number, because it can be changed into a prime (51565043) 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 3 ways as a sum of consecutive naturals, for example, 4203 + ... + 10990.

Almost surely, 2^51565042 is an apocalyptic number.

51565042 is a deficient number, since it is larger than the sum of its proper divisors (25833194).

51565042 is a wasteful number, since it uses less digits than its factorization.

51565042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16892.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 51565042 is about 7180.8803081516. The cubic root of 51565042 is about 372.2075045722.

The spelling of 51565042 in words is "fifty-one million, five hundred sixty-five thousand, forty-two".