513512255052 has 72 divisors (see below), whose sum is σ = 1334164259792. Its totient is φ = 166414953600.

The previous prime is 513512255051. The next prime is 513512255057. The reversal of 513512255052 is 250552215315.

513512255052 is a `hidden beast` number, since 5 + 1 + 3 + 51 + 2 + 2 + 550 + 52 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 513512254998 and 513512255016.

It is not an unprimeable number, because it can be changed into a prime (513512255051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1570302 + ... + 1868922.

Almost surely, 2^513512255052 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 513512255052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667082129896).

513512255052 is an abundant number, since it is smaller than the sum of its proper divisors (820652004740).

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

513512255052 is a wasteful number, since it uses less digits than its factorization.

513512255052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299959 (or 299954 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 513512255052 in words is "five hundred thirteen billion, five hundred twelve million, two hundred fifty-five thousand, fifty-two".