51340087 has 2 divisors, whose sum is σ = 51340088. Its totient is φ = 51340086.

The previous prime is 51340073. The next prime is 51340129. The reversal of 51340087 is 78004315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51340087 - 2²³ = 42951479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51340057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25670043 + 25670044.

It is an arithmetic number, because the mean of its divisors is an integer number (25670044).

Almost surely, 2^51340087 is an apocalyptic number.

51340087 is a deficient number, since it is larger than the sum of its proper divisors (1).

51340087 is an equidigital number, since it uses as much as digits as its factorization.

51340087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 51340087 is about 7165.1997180818. The cubic root of 51340087 is about 371.6654577996.

The spelling of 51340087 in words is "fifty-one million, three hundred forty thousand, eighty-seven".