51020525250 has 96 divisors (see below), whose sum is σ = 138331640304. Its totient is φ = 13568774400.

The previous prime is 51020525203. The next prime is 51020525377. The reversal of 51020525250 is 5252502015.

51020525250 is a `hidden beast` number, since 510 + 2 + 0 + 52 + 52 + 50 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 4895660961 + 46124864289 = 69969^2 + 214767^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 808854 + ... + 869646.

Almost surely, 2^51020525250 is an apocalyptic number.

51020525250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51020525250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69165820152).

51020525250 is an abundant number, since it is smaller than the sum of its proper divisors (87311115054).

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

51020525250 is a wasteful number, since it uses less digits than its factorization.

51020525250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61189 (or 61176 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The spelling of 51020525250 in words is "fifty-one billion, twenty million, five hundred twenty-five thousand, two hundred fifty".