11531320453 has 2 divisors, whose sum is σ = 11531320454. Its totient is φ = 11531320452.

The previous prime is 11531320417. The next prime is 11531320459. The reversal of 11531320453 is 35402313511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6432360804 + 5098959649 = 80202^2 + 71407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11531320453 is a prime.

It is a super-2 number, since 2×11531320453² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11531320459) 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, 5765660226 + 5765660227.

It is an arithmetic number, because the mean of its divisors is an integer number (5765660227).

Almost surely, 2^11531320453 is an apocalyptic number.

It is an amenable number.

11531320453 is a deficient number, since it is larger than the sum of its proper divisors (1).

11531320453 is an equidigital number, since it uses as much as digits as its factorization.

11531320453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 11531320453 its reverse (35402313511), we get a palindrome (46933633964).

The spelling of 11531320453 in words is "eleven billion, five hundred thirty-one million, three hundred twenty thousand, four hundred fifty-three".