51512803 has 2 divisors, whose sum is σ = 51512804. Its totient is φ = 51512802.

The previous prime is 51512789. The next prime is 51512821. The reversal of 51512803 is 30821515.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51512803 is a prime.

It is not a weakly prime, because it can be changed into another prime (51512603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25756401 + 25756402.

It is an arithmetic number, because the mean of its divisors is an integer number (25756402).

Almost surely, 2^51512803 is an apocalyptic number.

51512803 is a deficient number, since it is larger than the sum of its proper divisors (1).

51512803 is an equidigital number, since it uses as much as digits as its factorization.

51512803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 51512803 is about 7177.2420190488. The cubic root of 51512803 is about 372.0817713446.

The spelling of 51512803 in words is "fifty-one million, five hundred twelve thousand, eight hundred three".