51428511 has 12 divisors (see below), whose sum is σ = 74377680. Its totient is φ = 34243200.

The previous prime is 51428501. The next prime is 51428539. The reversal of 51428511 is 11582415.

51428511 is a `hidden beast` number, since 5 + 142 + 8 + 511 = 666.

It is not a de Polignac number, because 51428511 - 2¹³ = 51420319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51428501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5286 + ... + 11436.

It is an arithmetic number, because the mean of its divisors is an integer number (6198140).

Almost surely, 2^51428511 is an apocalyptic number.

51428511 is a deficient number, since it is larger than the sum of its proper divisors (22949169).

51428511 is a wasteful number, since it uses less digits than its factorization.

51428511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7086 (or 7083 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The square root of 51428511 is about 7171.3674428243. The cubic root of 51428511 is about 371.8787108920.

The spelling of 51428511 in words is "fifty-one million, four hundred twenty-eight thousand, five hundred eleven".