513550640331 has 12 divisors (see below), whose sum is σ = 741858928200. Its totient is φ = 342337758720.

The previous prime is 513550640329. The next prime is 513550640411. The reversal of 513550640331 is 133046055315.

513550640331 is a `hidden beast` number, since 5 + 1 + 3 + 5 + 5 + 0 + 640 + 3 + 3 + 1 = 666.

It is not a de Polignac number, because 513550640331 - 2¹ = 513550640329 is a prime.

It is a super-2 number, since 2×513550640331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (513550640231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2333430 + ... + 2544011.

It is an arithmetic number, because the mean of its divisors is an integer number (61821577350).

Almost surely, 2^513550640331 is an apocalyptic number.

513550640331 is a deficient number, since it is larger than the sum of its proper divisors (228308287869).

513550640331 is a wasteful number, since it uses less digits than its factorization.

513550640331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4889146 (or 4889143 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

Adding to 513550640331 its reverse (133046055315), we get a palindrome (646596695646).

The spelling of 513550640331 in words is "five hundred thirteen billion, five hundred fifty million, six hundred forty thousand, three hundred thirty-one".