51280055403 has 4 divisors (see below), whose sum is σ = 68373407208. Its totient is φ = 34186703600.

The previous prime is 51280055389. The next prime is 51280055429. The reversal of 51280055403 is 30455008215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51280055403 - 2¹⁶ = 51279989867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51280055443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8546675898 + ... + 8546675903.

It is an arithmetic number, because the mean of its divisors is an integer number (17093351802).

Almost surely, 2^51280055403 is an apocalyptic number.

51280055403 is a deficient number, since it is larger than the sum of its proper divisors (17093351805).

51280055403 is a wasteful number, since it uses less digits than its factorization.

51280055403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17093351804.

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 51280055403 in words is "fifty-one billion, two hundred eighty million, fifty-five thousand, four hundred three".