135505481 has 2 divisors, whose sum is σ = 135505482. Its totient is φ = 135505480.

The previous prime is 135505463. The next prime is 135505529. The reversal of 135505481 is 184505531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100801600 + 34703881 = 10040^2 + 5891^2 .

It is a cyclic number.

It is not a de Polignac number, because 135505481 - 2¹⁸ = 135243337 is a prime.

It is a super-2 number, since 2×135505481² = 36723470762082722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135505441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67752740 + 67752741.

It is an arithmetic number, because the mean of its divisors is an integer number (67752741).

Almost surely, 2^135505481 is an apocalyptic number.

It is an amenable number.

135505481 is a deficient number, since it is larger than the sum of its proper divisors (1).

135505481 is an equidigital number, since it uses as much as digits as its factorization.

135505481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 135505481 is about 11640.6821535510. The cubic root of 135505481 is about 513.6322534703.

Subtracting 135505481 from its reverse (184505531), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 135505481 in words is "one hundred thirty-five million, five hundred five thousand, four hundred eighty-one".