13551912481 has 2 divisors, whose sum is σ = 13551912482. Its totient is φ = 13551912480.

The previous prime is 13551912449. The next prime is 13551912509. The reversal of 13551912481 is 18421915531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13511970081 + 39942400 = 116241^2 + 6320^2 .

It is a cyclic number.

It is not a de Polignac number, because 13551912481 - 2⁵ = 13551912449 is a prime.

It is a super-2 number, since 2×13551912481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13551912401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6775956240 + 6775956241.

It is an arithmetic number, because the mean of its divisors is an integer number (6775956241).

Almost surely, 2^13551912481 is an apocalyptic number.

It is an amenable number.

13551912481 is a deficient number, since it is larger than the sum of its proper divisors (1).

13551912481 is an equidigital number, since it uses as much as digits as its factorization.

13551912481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 40.

The spelling of 13551912481 in words is "thirteen billion, five hundred fifty-one million, nine hundred twelve thousand, four hundred eighty-one".