51428123 has 2 divisors, whose sum is σ = 51428124. Its totient is φ = 51428122.

The previous prime is 51428099. The next prime is 51428141. The reversal of 51428123 is 32182415.

51428123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51428123 - 2⁶ = 51428059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51428092 and 51428101.

It is not a weakly prime, because it can be changed into another prime (51428173) 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 as a sum of consecutive naturals, namely, 25714061 + 25714062.

It is an arithmetic number, because the mean of its divisors is an integer number (25714062).

Almost surely, 2^51428123 is an apocalyptic number.

51428123 is a deficient number, since it is larger than the sum of its proper divisors (1).

51428123 is an equidigital number, since it uses as much as digits as its factorization.

51428123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

The square root of 51428123 is about 7171.3403907498. The cubic root of 51428123 is about 371.8777756825.

The spelling of 51428123 in words is "fifty-one million, four hundred twenty-eight thousand, one hundred twenty-three".