51450887 has 2 divisors, whose sum is σ = 51450888. Its totient is φ = 51450886.

The previous prime is 51450871. The next prime is 51450899. The reversal of 51450887 is 78805415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51450887 - 2⁴ = 51450871 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51450887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51450587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25725443 + 25725444.

It is an arithmetic number, because the mean of its divisors is an integer number (25725444).

Almost surely, 2^51450887 is an apocalyptic number.

51450887 is a deficient number, since it is larger than the sum of its proper divisors (1).

51450887 is an equidigital number, since it uses as much as digits as its factorization.

51450887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 51450887 is about 7172.9273661456. The cubic root of 51450887 is about 371.9326365671.

The spelling of 51450887 in words is "fifty-one million, four hundred fifty thousand, eight hundred eighty-seven".