51521550024 has 128 divisors (see below), whose sum is σ = 150493593600. Its totient is φ = 14392185600.

The previous prime is 51521550019. The next prime is 51521550029. The reversal of 51521550024 is 42005512515.

It is an interprime number because it is at equal distance from previous prime (51521550019) and next prime (51521550029).

It is a junction number, because it is equal to n+sod(n) for n = 51521549973 and 51521550000.

It is not an unprimeable number, because it can be changed into a prime (51521550029) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 9085462 + ... + 9091130.

It is an arithmetic number, because the mean of its divisors is an integer number (1175731200).

Almost surely, 2^51521550024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51521550024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75246796800).

51521550024 is an abundant number, since it is smaller than the sum of its proper divisors (98972043576).

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

51521550024 is a wasteful number, since it uses less digits than its factorization.

51521550024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6883 (or 6879 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The spelling of 51521550024 in words is "fifty-one billion, five hundred twenty-one million, five hundred fifty thousand, twenty-four".