11311520253413 has 4 divisors (see below), whose sum is σ = 11313173749548. Its totient is φ = 11309866757280.

The previous prime is 11311520253409. The next prime is 11311520253419. The reversal of 11311520253413 is 31435202511311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5103614137924 + 6207906115489 = 2259118^2 + 2491567^2 .

It is a cyclic number.

It is not a de Polignac number, because 11311520253413 - 2² = 11311520253409 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 11311520253413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311520253419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826737806 + ... + 826751487.

It is an arithmetic number, because the mean of its divisors is an integer number (2828293437387).

Almost surely, 2^{11311520253413} is an apocalyptic number.

It is an amenable number.

11311520253413 is a deficient number, since it is larger than the sum of its proper divisors (1653496135).

11311520253413 is an equidigital number, since it uses as much as digits as its factorization.

11311520253413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653496134.

The product of its (nonzero) digits is 10800, while the sum is 32.

Adding to 11311520253413 its reverse (31435202511311), we get a palindrome (42746722764724).

The spelling of 11311520253413 in words is "eleven trillion, three hundred eleven billion, five hundred twenty million, two hundred fifty-three thousand, four hundred thirteen".