135503551 has 2 divisors, whose sum is σ = 135503552. Its totient is φ = 135503550.

The previous prime is 135503531. The next prime is 135503569. The reversal of 135503551 is 155305531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135503551 - 2¹¹ = 135501503 is a prime.

It is a super-2 number, since 2×135503551² = 36722424667219202, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135503521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67751775 + 67751776.

It is an arithmetic number, because the mean of its divisors is an integer number (67751776).

Almost surely, 2^135503551 is an apocalyptic number.

135503551 is a deficient number, since it is larger than the sum of its proper divisors (1).

135503551 is an equidigital number, since it uses as much as digits as its factorization.

135503551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5625, while the sum is 28.

The square root of 135503551 is about 11640.5992543339. The cubic root of 135503551 is about 513.6298149097.

The spelling of 135503551 in words is "one hundred thirty-five million, five hundred three thousand, five hundred fifty-one".