51520531024 has 160 divisors (see below), whose sum is σ = 116912160000. Its totient is φ = 21815304192.

The previous prime is 51520530991. The next prime is 51520531031. The reversal of 51520531024 is 42013502515.

51520531024 is a modest number, since divided by 531024 gives 51520 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 51520530983 and 51520531001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17709282 + ... + 17712190.

It is an arithmetic number, because the mean of its divisors is an integer number (730701000).

Almost surely, 2^51520531024 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 51520531024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58456080000).

51520531024 is an abundant number, since it is smaller than the sum of its proper divisors (65391628976).

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

51520531024 is a wasteful number, since it uses less digits than its factorization.

51520531024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125 (or 3119 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 51520531024 in words is "fifty-one billion, five hundred twenty million, five hundred thirty-one thousand, twenty-four".