51503875000 has 56 divisors (see below), whose sum is σ = 120710954880. Its totient is φ = 20601500000.

The previous prime is 51503874973. The next prime is 51503875009. The reversal of 51503875000 is 57830515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51503875009) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 81016 + ... + 331015.

Almost surely, 2^51503875000 is an apocalyptic number.

51503875000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51503875000 is an abundant number, since it is smaller than the sum of its proper divisors (69207079880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51503875000 is an frugal number, since it uses more digits than its factorization.

51503875000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412067 (or 412038 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 34.

The spelling of 51503875000 in words is "fifty-one billion, five hundred three million, eight hundred seventy-five thousand".