52113521000 has 64 divisors (see below), whose sum is σ = 122077434960. Its totient is φ = 20822880000.

The previous prime is 52113520981. The next prime is 52113521027. The reversal of 52113521000 is 12531125.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 13171234756 + 38942286244 = 114766^2 + 197338^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 913310 + ... + 968690.

Almost surely, 2^52113521000 is an apocalyptic number.

52113521000 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 52113521000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61038717480).

52113521000 is an abundant number, since it is smaller than the sum of its proper divisors (69963913960).

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

52113521000 is a wasteful number, since it uses less digits than its factorization.

52113521000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56343 (or 56329 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The spelling of 52113521000 in words is "fifty-two billion, one hundred thirteen million, five hundred twenty-one thousand".