50551987 has 2 divisors, whose sum is σ = 50551988. Its totient is φ = 50551986.

The previous prime is 50551957. The next prime is 50552009. The reversal of 50551987 is 78915505.

50551987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50551987 is a prime.

It is not a weakly prime, because it can be changed into another prime (50551957) 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, 25275993 + 25275994.

It is an arithmetic number, because the mean of its divisors is an integer number (25275994).

Almost surely, 2^50551987 is an apocalyptic number.

50551987 is a deficient number, since it is larger than the sum of its proper divisors (1).

50551987 is an equidigital number, since it uses as much as digits as its factorization.

50551987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63000, while the sum is 40.

The square root of 50551987 is about 7109.9920534414. The cubic root of 50551987 is about 369.7538830735.

The spelling of 50551987 in words is "fifty million, five hundred fifty-one thousand, nine hundred eighty-seven".