51065578 has 32 divisors (see below), whose sum is σ = 84240000. Its totient is φ = 23123520.

The previous prime is 51065533. The next prime is 51065579. The reversal of 51065578 is 87556015.

51065578 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 (51065579) 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 15 ways as a sum of consecutive naturals, for example, 164043 + ... + 164353.

It is an arithmetic number, because the mean of its divisors is an integer number (2632500).

Almost surely, 2^51065578 is an apocalyptic number.

51065578 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

51065578 is a deficient number, since it is larger than the sum of its proper divisors (33174422).

51065578 is a wasteful number, since it uses less digits than its factorization.

51065578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 51065578 is about 7146.0183319104. The cubic root of 51065578 is about 371.0018574799.

The spelling of 51065578 in words is "fifty-one million, sixty-five thousand, five hundred seventy-eight".