513230121013520 has 40 divisors (see below), whose sum is σ = 1193329373858520. Its totient is φ = 205280118512640.

The previous prime is 513230121013513. The next prime is 513230121013537. The reversal of 513230121013520 is 25310121032315.

It can be written as a sum of positive squares in 4 ways, for example, as 87442248315136 + 425787872698384 = 9351056^2 + 20634628^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185019251 + ... + 187772690.

It is an arithmetic number, because the mean of its divisors is an integer number (29833234346463).

Almost surely, 2^{513230121013520} is an apocalyptic number.

It is an amenable number.

513230121013520 is an abundant number, since it is smaller than the sum of its proper divisors (680099252845000).

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

513230121013520 is a wasteful number, since it uses less digits than its factorization.

513230121013520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372809163 (or 372809157 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 513230121013520 its reverse (25310121032315), we get a palindrome (538540242045835).

The spelling of 513230121013520 in words is "five hundred thirteen trillion, two hundred thirty billion, one hundred twenty-one million, thirteen thousand, five hundred twenty".