51403687 has 2 divisors, whose sum is σ = 51403688. Its totient is φ = 51403686.

The previous prime is 51403669. The next prime is 51403739. The reversal of 51403687 is 78630415.

51403687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51403687 - 2⁷ = 51403559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51403657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25701843 + 25701844.

It is an arithmetic number, because the mean of its divisors is an integer number (25701844).

Almost surely, 2^51403687 is an apocalyptic number.

51403687 is a deficient number, since it is larger than the sum of its proper divisors (1).

51403687 is an equidigital number, since it uses as much as digits as its factorization.

51403687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 51403687 is about 7169.6364621925. The cubic root of 51403687 is about 371.8188672848.

The spelling of 51403687 in words is "fifty-one million, four hundred three thousand, six hundred eighty-seven".