513050520040 has 32 divisors (see below), whose sum is σ = 1155857095080. Its totient is φ = 204954710272.

The previous prime is 513050519987. The next prime is 513050520041. The reversal of 513050520040 is 40025050315.

It can be written as a sum of positive squares in 4 ways, for example, as 196218877156 + 316831642884 = 442966^2 + 562878^2 .

It is a super-2 number, since 2×513050520040² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 513050519987 and 513050520014.

It is not an unprimeable number, because it can be changed into a prime (513050520041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8265499 + ... + 8327338.

Almost surely, 2^513050520040 is an apocalyptic number.

It is an amenable number.

513050520040 is an abundant number, since it is smaller than the sum of its proper divisors (642806575040).

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

513050520040 is a wasteful number, since it uses less digits than its factorization.

513050520040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16593621 (or 16593617 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 513050520040 its reverse (40025050315), we get a palindrome (553075570355).

The spelling of 513050520040 in words is "five hundred thirteen billion, fifty million, five hundred twenty thousand, forty".