51042117 has 16 divisors (see below), whose sum is σ = 80461440. Its totient is φ = 28160832.

The previous prime is 51042053. The next prime is 51042149. The reversal of 51042117 is 71124015.

It is a happy number.

51042117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51042117 - 2⁶ = 51042053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 51042093 and 51042102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51042217) 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, 41298 + ... + 42515.

It is an arithmetic number, because the mean of its divisors is an integer number (5028840).

Almost surely, 2^51042117 is an apocalyptic number.

It is an amenable number.

51042117 is a deficient number, since it is larger than the sum of its proper divisors (29419323).

51042117 is a wasteful number, since it uses less digits than its factorization.

51042117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83852.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 51042117 is about 7144.3765998161. The cubic root of 51042117 is about 370.9450324572.

The spelling of 51042117 in words is "fifty-one million, forty-two thousand, one hundred seventeen".