513105205530 has 64 divisors (see below), whose sum is σ = 1241764546176. Its totient is φ = 135683808000.

The previous prime is 513105205507. The next prime is 513105205537. The reversal of 513105205530 is 35502501315.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (513105205537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5380060 + ... + 5474600.

It is an arithmetic number, because the mean of its divisors is an integer number (19402571034).

Almost surely, 2^513105205530 is an apocalyptic number.

513105205530 is an abundant number, since it is smaller than the sum of its proper divisors (728659340646).

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

513105205530 is a wasteful number, since it uses less digits than its factorization.

513105205530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96063.

The product of its (nonzero) digits is 11250, while the sum is 30.

Adding to 513105205530 its reverse (35502501315), we get a palindrome (548607706845).

The spelling of 513105205530 in words is "five hundred thirteen billion, one hundred five million, two hundred five thousand, five hundred thirty".