51320003 has 16 divisors (see below), whose sum is σ = 60292800. Its totient is φ = 43662528.

The previous prime is 51319993. The next prime is 51320033. The reversal of 51320003 is 30002315.

It is not a de Polignac number, because 51320003 - 2¹⁰ = 51318979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51320003.

It is not an unprimeable number, because it can be changed into a prime (51320033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53375 + ... + 54327.

It is an arithmetic number, because the mean of its divisors is an integer number (3768300).

Almost surely, 2^51320003 is an apocalyptic number.

51320003 is a deficient number, since it is larger than the sum of its proper divisors (8972797).

51320003 is an equidigital number, since it uses as much as digits as its factorization.

51320003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 51320003 is about 7163.7980848151. The cubic root of 51320003 is about 371.6169868869.

Adding to 51320003 its reverse (30002315), we get a palindrome (81322318).

The spelling of 51320003 in words is "fifty-one million, three hundred twenty thousand, three".