56128015 has 8 divisors (see below), whose sum is σ = 67406400. Its totient is φ = 44867232.

The previous prime is 56128013. The next prime is 56128063. The reversal of 56128015 is 51082165.

56128015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 56128015 - 2¹ = 56128013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56128013) 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 7 ways as a sum of consecutive naturals, for example, 4122 + ... + 11368.

It is an arithmetic number, because the mean of its divisors is an integer number (8425800).

Almost surely, 2^56128015 is an apocalyptic number.

56128015 is a deficient number, since it is larger than the sum of its proper divisors (11278385).

56128015 is a wasteful number, since it uses less digits than its factorization.

56128015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8801.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 56128015 is about 7491.8632528898. The cubic root of 56128015 is about 382.8775431282.

The spelling of 56128015 in words is "fifty-six million, one hundred twenty-eight thousand, fifteen".