51978530003 has 4 divisors (see below), whose sum is σ = 52562558520. Its totient is φ = 51394501488.

The previous prime is 51978529991. The next prime is 51978530041. The reversal of 51978530003 is 30003587915.

It is a happy number.

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 51978530003 - 2¹⁴ = 51978513619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51978530053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292014125 + ... + 292014302.

It is an arithmetic number, because the mean of its divisors is an integer number (13140639630).

Almost surely, 2^51978530003 is an apocalyptic number.

51978530003 is a deficient number, since it is larger than the sum of its proper divisors (584028517).

51978530003 is an equidigital number, since it uses as much as digits as its factorization.

51978530003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584028516.

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 51978530003 in words is "fifty-one billion, nine hundred seventy-eight million, five hundred thirty thousand, three".