51002512520 has 64 divisors (see below), whose sum is σ = 117883382400. Its totient is φ = 19847749120.

The previous prime is 51002512493. The next prime is 51002512523. The reversal of 51002512520 is 2521520015.

It is not an unprimeable number, because it can be changed into a prime (51002512523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545447 + ... + 632073.

It is an arithmetic number, because the mean of its divisors is an integer number (1841927850).

Almost surely, 2^51002512520 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 51002512520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58941691200).

51002512520 is an abundant number, since it is smaller than the sum of its proper divisors (66880869880).

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

51002512520 is a wasteful number, since it uses less digits than its factorization.

51002512520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87038 (or 87034 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The spelling of 51002512520 in words is "fifty-one billion, two million, five hundred twelve thousand, five hundred twenty".