51078155 has 8 divisors (see below), whose sum is σ = 61387632. Its totient is φ = 40799968.

The previous prime is 51078151. The next prime is 51078179. The reversal of 51078155 is 55187015.

It is a happy number.

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 51078155 - 2² = 51078151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51078151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4064 + ... + 10893.

It is an arithmetic number, because the mean of its divisors is an integer number (7673454).

Almost surely, 2^51078155 is an apocalyptic number.

51078155 is a deficient number, since it is larger than the sum of its proper divisors (10309477).

51078155 is a wasteful number, since it uses less digits than its factorization.

51078155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15645.

The product of its (nonzero) digits is 7000, while the sum is 32.

The square root of 51078155 is about 7146.8982782743. The cubic root of 51078155 is about 371.0323131379.

The spelling of 51078155 in words is "fifty-one million, seventy-eight thousand, one hundred fifty-five".