51356287 has 2 divisors, whose sum is σ = 51356288. Its totient is φ = 51356286.

The previous prime is 51356281. The next prime is 51356339. The reversal of 51356287 is 78265315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51356287 - 2⁷ = 51356159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51356281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25678143 + 25678144.

It is an arithmetic number, because the mean of its divisors is an integer number (25678144).

Almost surely, 2^51356287 is an apocalyptic number.

51356287 is a deficient number, since it is larger than the sum of its proper divisors (1).

51356287 is an equidigital number, since it uses as much as digits as its factorization.

51356287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 51356287 is about 7166.3300928718. The cubic root of 51356287 is about 371.7045458208.

The spelling of 51356287 in words is "fifty-one million, three hundred fifty-six thousand, two hundred eighty-seven".