51504222403 has 4 divisors (see below), whose sum is σ = 51514234200. Its totient is φ = 51494210608.

The previous prime is 51504222377. The next prime is 51504222421. The reversal of 51504222403 is 30422240515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30422240515 = 5 ⋅6084448103.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51504222403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51504222443) 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, 4998178 + ... + 5008471.

It is an arithmetic number, because the mean of its divisors is an integer number (12878558550).

Almost surely, 2^51504222403 is an apocalyptic number.

51504222403 is a deficient number, since it is larger than the sum of its proper divisors (10011797).

51504222403 is a wasteful number, since it uses less digits than its factorization.

51504222403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10011796.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 51504222403 its reverse (30422240515), we get a palindrome (81926462918).

The spelling of 51504222403 in words is "fifty-one billion, five hundred four million, two hundred twenty-two thousand, four hundred three".