51520441500 has 192 divisors, whose sum is σ = 181852070400. Its totient is φ = 12489768000.

The previous prime is 51520441433. The next prime is 51520441541. The reversal of 51520441500 is 514402515.

51520441500 is a `hidden beast` number, since 5 + 152 + 0 + 4 + 4 + 1 + 500 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24970 + ... + 321969.

It is an arithmetic number, because the mean of its divisors is an integer number (947146200).

Almost surely, 2^51520441500 is an apocalyptic number.

51520441500 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 51520441500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90926035200).

51520441500 is an abundant number, since it is smaller than the sum of its proper divisors (130331628900).

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

51520441500 is a wasteful number, since it uses less digits than its factorization.

51520441500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346978 (or 346960 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 51520441500 in words is "fifty-one billion, five hundred twenty million, four hundred forty-one thousand, five hundred".