13531155551 has 2 divisors, whose sum is σ = 13531155552. Its totient is φ = 13531155550.

The previous prime is 13531155529. The next prime is 13531155563. The reversal of 13531155551 is 15555113531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13531155551 - 2⁶ = 13531155487 is a prime.

It is a super-2 number, since 2×13531155551² (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 (13531155511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765577775 + 6765577776.

It is an arithmetic number, because the mean of its divisors is an integer number (6765577776).

Almost surely, 2^13531155551 is an apocalyptic number.

13531155551 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531155551 is an equidigital number, since it uses as much as digits as its factorization.

13531155551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28125, while the sum is 35.

The spelling of 13531155551 in words is "thirteen billion, five hundred thirty-one million, one hundred fifty-five thousand, five hundred fifty-one".