13531123553 has 2 divisors, whose sum is σ = 13531123554. Its totient is φ = 13531123552.

The previous prime is 13531123519. The next prime is 13531123643. The reversal of 13531123553 is 35532113531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12368108944 + 1163014609 = 111212^2 + 34103^2 .

It is a cyclic number.

It is not a de Polignac number, because 13531123553 - 2¹⁰ = 13531122529 is a prime.

It is a super-3 number, since 3×13531123553³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (13531123153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765561776 + 6765561777.

It is an arithmetic number, because the mean of its divisors is an integer number (6765561777).

Almost surely, 2^13531123553 is an apocalyptic number.

It is an amenable number.

13531123553 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531123553 is an equidigital number, since it uses as much as digits as its factorization.

13531123553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20250, while the sum is 32.

The spelling of 13531123553 in words is "thirteen billion, five hundred thirty-one million, one hundred twenty-three thousand, five hundred fifty-three".