51284879 has 2 divisors, whose sum is σ = 51284880. Its totient is φ = 51284878.

The previous prime is 51284873. The next prime is 51284897. The reversal of 51284879 is 97848215.

Together with next prime (51284897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51284879 - 2¹² = 51280783 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51284873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25642439 + 25642440.

It is an arithmetic number, because the mean of its divisors is an integer number (25642440).

Almost surely, 2^51284879 is an apocalyptic number.

51284879 is a deficient number, since it is larger than the sum of its proper divisors (1).

51284879 is an equidigital number, since it uses as much as digits as its factorization.

51284879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 44.

The square root of 51284879 is about 7161.3461723338. The cubic root of 51284879 is about 371.5321878922.

The spelling of 51284879 in words is "fifty-one million, two hundred eighty-four thousand, eight hundred seventy-nine".