51025403500 has 48 divisors (see below), whose sum is σ = 111465900000. Its totient is φ = 20405323200.

The previous prime is 51025403489. The next prime is 51025403519. The reversal of 51025403500 is 530452015.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2712126 + ... + 2730874.

It is an arithmetic number, because the mean of its divisors is an integer number (2322206250).

Almost surely, 2^51025403500 is an apocalyptic number.

51025403500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51025403500 is an abundant number, since it is smaller than the sum of its proper divisors (60440496500).

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

51025403500 is a wasteful number, since it uses less digits than its factorization.

51025403500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24211 (or 24199 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 51025403500 its reverse (530452015), we get a palindrome (51555855515).

The spelling of 51025403500 in words is "fifty-one billion, twenty-five million, four hundred three thousand, five hundred".