51550301500 has 48 divisors (see below), whose sum is σ = 112710439296. Its totient is φ = 20597304000.

The previous prime is 51550301489. The next prime is 51550301531. The reversal of 51550301500 is 510305515.

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

It is a congruent number.

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, 398914 + ... + 512086.

It is an arithmetic number, because the mean of its divisors is an integer number (2348134152).

Almost surely, 2^51550301500 is an apocalyptic number.

51550301500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51550301500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56355219648).

51550301500 is an abundant number, since it is smaller than the sum of its proper divisors (61160137796).

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

51550301500 is a wasteful number, since it uses less digits than its factorization.

51550301500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114103 (or 114091 counting only the distinct ones).

The product of its (nonzero) digits is 1875, while the sum is 25.

The spelling of 51550301500 in words is "fifty-one billion, five hundred fifty million, three hundred one thousand, five hundred".