521240136653113 has 8 divisors (see below), whose sum is σ = 524255402476800. Its totient is φ = 518224897462608.

The previous prime is 521240136653111. The next prime is 521240136653123. The reversal of 521240136653113 is 311356631042125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521240136653113 - 2¹ = 521240136653111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 521240136653113.

It is not an unprimeable number, because it can be changed into a prime (521240136653111) 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, 33288258 + ... + 46374436.

It is an arithmetic number, because the mean of its divisors is an integer number (65531925309600).

Almost surely, 2^{521240136653113} is an apocalyptic number.

It is an amenable number.

521240136653113 is a deficient number, since it is larger than the sum of its proper divisors (3015265823687).

521240136653113 is a wasteful number, since it uses less digits than its factorization.

521240136653113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13316591.

The product of its (nonzero) digits is 388800, while the sum is 43.

Adding to 521240136653113 its reverse (311356631042125), we get a palindrome (832596767695238).

The spelling of 521240136653113 in words is "five hundred twenty-one trillion, two hundred forty billion, one hundred thirty-six million, six hundred fifty-three thousand, one hundred thirteen".