51079187 has 4 divisors (see below), whose sum is σ = 51344040. Its totient is φ = 50814336.

The previous prime is 51079183. The next prime is 51079219. The reversal of 51079187 is 78197015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51079187 - 2² = 51079183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51079187.

It is not an unprimeable number, because it can be changed into a prime (51079181) 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 3 ways as a sum of consecutive naturals, for example, 132137 + ... + 132522.

It is an arithmetic number, because the mean of its divisors is an integer number (12836010).

Almost surely, 2^51079187 is an apocalyptic number.

51079187 is a deficient number, since it is larger than the sum of its proper divisors (264853).

51079187 is a wasteful number, since it uses less digits than its factorization.

51079187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264852.

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 51079187 is about 7146.9704770623. The cubic root of 51079187 is about 371.0348119411.

It can be divided in two parts, 510 and 79187, that added together give a palindrome (79697).

The spelling of 51079187 in words is "fifty-one million, seventy-nine thousand, one hundred eighty-seven".