51428111 has 16 divisors (see below), whose sum is σ = 62726400. Its totient is φ = 41159040.

The previous prime is 51428099. The next prime is 51428123. The reversal of 51428111 is 11182415.

51428111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51428099) and next prime (51428123).

It is not a de Polignac number, because 51428111 - 2¹⁸ = 51165967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51428141) 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, 13940 + ... + 17238.

It is an arithmetic number, because the mean of its divisors is an integer number (3920400).

Almost surely, 2^51428111 is an apocalyptic number.

51428111 is a deficient number, since it is larger than the sum of its proper divisors (11298289).

51428111 is a wasteful number, since it uses less digits than its factorization.

51428111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3454.

The product of its digits is 320, while the sum is 23.

The square root of 51428111 is about 7171.3395540861. The cubic root of 51428111 is about 371.8777467584.

The spelling of 51428111 in words is "fifty-one million, four hundred twenty-eight thousand, one hundred eleven".