51256279 has 2 divisors, whose sum is σ = 51256280. Its totient is φ = 51256278.

The previous prime is 51256277. The next prime is 51256297. The reversal of 51256279 is 97265215.

Together with next prime (51256297) 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 51256279 - 2¹ = 51256277 is a prime.

It is a super-2 number, since 2×51256279² = 5254412273851682, which contains 22 as substring.

Together with 51256277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51256277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25628139 + 25628140.

It is an arithmetic number, because the mean of its divisors is an integer number (25628140).

Almost surely, 2^51256279 is an apocalyptic number.

51256279 is a deficient number, since it is larger than the sum of its proper divisors (1).

51256279 is an equidigital number, since it uses as much as digits as its factorization.

51256279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 51256279 is about 7159.3490625894. The cubic root of 51256279 is about 371.4631110244.

The spelling of 51256279 in words is "fifty-one million, two hundred fifty-six thousand, two hundred seventy-nine".