51281358803 has 2 divisors, whose sum is σ = 51281358804. Its totient is φ = 51281358802.

The previous prime is 51281358797. The next prime is 51281358881. The reversal of 51281358803 is 30885318215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51281358803 - 2⁴ = 51281358787 is a prime.

It is not a weakly prime, because it can be changed into another prime (51281358893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25640679401 + 25640679402.

It is an arithmetic number, because the mean of its divisors is an integer number (25640679402).

Almost surely, 2^51281358803 is an apocalyptic number.

51281358803 is a deficient number, since it is larger than the sum of its proper divisors (1).

51281358803 is an equidigital number, since it uses as much as digits as its factorization.

51281358803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 44.

The spelling of 51281358803 in words is "fifty-one billion, two hundred eighty-one million, three hundred fifty-eight thousand, eight hundred three".