51504100403 has 4 divisors (see below), whose sum is σ = 58861829040. Its totient is φ = 44146371768.

The previous prime is 51504100391. The next prime is 51504100423. The reversal of 51504100403 is 30400140515.

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 51504100403 - 2¹² = 51504096307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51504100423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3678864308 + ... + 3678864321.

It is an arithmetic number, because the mean of its divisors is an integer number (14715457260).

Almost surely, 2^51504100403 is an apocalyptic number.

51504100403 is a deficient number, since it is larger than the sum of its proper divisors (7357728637).

51504100403 is an equidigital number, since it uses as much as digits as its factorization.

51504100403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7357728636.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 51504100403 its reverse (30400140515), we get a palindrome (81904240918).

The spelling of 51504100403 in words is "fifty-one billion, five hundred four million, one hundred thousand, four hundred three".