11223136531 has 2 divisors, whose sum is σ = 11223136532. Its totient is φ = 11223136530.

The previous prime is 11223136523. The next prime is 11223136537. The reversal of 11223136531 is 13563132211.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (13563132211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11223136531 - 2³ = 11223136523 is a prime.

It is a super-3 number, since 3×11223136531³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 11223136531.

It is not a weakly prime, because it can be changed into another prime (11223136537) 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 as a sum of consecutive naturals, namely, 5611568265 + 5611568266.

It is an arithmetic number, because the mean of its divisors is an integer number (5611568266).

Almost surely, 2^11223136531 is an apocalyptic number.

11223136531 is a deficient number, since it is larger than the sum of its proper divisors (1).

11223136531 is an equidigital number, since it uses as much as digits as its factorization.

11223136531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

Adding to 11223136531 its reverse (13563132211), we get a palindrome (24786268742).

The spelling of 11223136531 in words is "eleven billion, two hundred twenty-three million, one hundred thirty-six thousand, five hundred thirty-one".