51200987 has 2 divisors, whose sum is σ = 51200988. Its totient is φ = 51200986.

The previous prime is 51200977. The next prime is 51201047. The reversal of 51200987 is 78900215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51200987 - 2⁴ = 51200971 is a prime.

It is not a weakly prime, because it can be changed into another prime (51200977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25600493 + 25600494.

It is an arithmetic number, because the mean of its divisors is an integer number (25600494).

Almost surely, 2^51200987 is an apocalyptic number.

51200987 is a deficient number, since it is larger than the sum of its proper divisors (1).

51200987 is an equidigital number, since it uses as much as digits as its factorization.

51200987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 51200987 is about 7155.4864963886. The cubic root of 51200987 is about 371.3294927404.

The spelling of 51200987 in words is "fifty-one million, two hundred thousand, nine hundred eighty-seven".