51504323503 has 4 divisors (see below), whose sum is σ = 51507688320. Its totient is φ = 51500958688.

The previous prime is 51504323471. The next prime is 51504323509. The reversal of 51504323503 is 30532340515.

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 51504323503 - 2⁵ = 51504323471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51504323509) 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, 1659343 + ... + 1690096.

It is an arithmetic number, because the mean of its divisors is an integer number (12876922080).

Almost surely, 2^51504323503 is an apocalyptic number.

51504323503 is a deficient number, since it is larger than the sum of its proper divisors (3364817).

51504323503 is a wasteful number, since it uses less digits than its factorization.

51504323503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364816.

The product of its (nonzero) digits is 27000, while the sum is 31.

The spelling of 51504323503 in words is "fifty-one billion, five hundred four million, three hundred twenty-three thousand, five hundred three".