11551531211413 has 16 divisors (see below), whose sum is σ = 12016912962096. Its totient is φ = 11095448463360.

The previous prime is 11551531211383. The next prime is 11551531211431. The reversal of 11551531211413 is 31411213515511.

It can be written as a sum of positive squares in 8 ways, for example, as 619924746609 + 10931606464804 = 787353^2 + 3306298^2 .

It is a cyclic number.

It is not a de Polignac number, because 11551531211413 - 2³³ = 11542941276821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551531211443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1797456 + ... + 5131657.

It is an arithmetic number, because the mean of its divisors is an integer number (751057060131).

Almost surely, 2^{11551531211413} is an apocalyptic number.

It is an amenable number.

11551531211413 is a deficient number, since it is larger than the sum of its proper divisors (465381750683).

11551531211413 is an equidigital number, since it uses as much as digits as its factorization.

11551531211413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6929784.

The product of its digits is 9000, while the sum is 34.

Adding to 11551531211413 its reverse (31411213515511), we get a palindrome (42962744726924).

The spelling of 11551531211413 in words is "eleven trillion, five hundred fifty-one billion, five hundred thirty-one million, two hundred eleven thousand, four hundred thirteen".