11551531214311 has 16 divisors (see below), whose sum is σ = 13401667964160. Its totient is φ = 9846123367680.

The previous prime is 11551531214303. The next prime is 11551531214347. The reversal of 11551531214311 is 11341213515511.

It is a cyclic number.

It is not a de Polignac number, because 11551531214311 - 2³ = 11551531214303 is a prime.

It is a super-2 number, since 2×11551531214311² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551531214411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284879131 + ... + 284919676.

It is an arithmetic number, because the mean of its divisors is an integer number (837604247760).

Almost surely, 2^{11551531214311} is an apocalyptic number.

11551531214311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11551531214311 is a deficient number, since it is larger than the sum of its proper divisors (1850136749849).

11551531214311 is a wasteful number, since it uses less digits than its factorization.

11551531214311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569798934.

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

Adding to 11551531214311 its reverse (11341213515511), we get a palindrome (22892744729822).

The spelling of 11551531214311 in words is "eleven trillion, five hundred fifty-one billion, five hundred thirty-one million, two hundred fourteen thousand, three hundred eleven".