51590887 has 2 divisors, whose sum is σ = 51590888. Its totient is φ = 51590886.

The previous prime is 51590867. The next prime is 51590893. The reversal of 51590887 is 78809515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51590887 - 2¹⁹ = 51066599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51590837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25795443 + 25795444.

It is an arithmetic number, because the mean of its divisors is an integer number (25795444).

Almost surely, 2^51590887 is an apocalyptic number.

51590887 is a deficient number, since it is larger than the sum of its proper divisors (1).

51590887 is an equidigital number, since it uses as much as digits as its factorization.

51590887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 51590887 is about 7182.6796531657. The cubic root of 51590887 is about 372.2696790989.

The spelling of 51590887 in words is "fifty-one million, five hundred ninety thousand, eight hundred eighty-seven".