135543551 has 8 divisors (see below), whose sum is σ = 159240144. Its totient is φ = 113742720.

The previous prime is 135543523. The next prime is 135543557. The reversal of 135543551 is 155345531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135543551 - 2¹⁰ = 135542527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135543557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473786 + ... + 474071.

It is an arithmetic number, because the mean of its divisors is an integer number (19905018).

Almost surely, 2^135543551 is an apocalyptic number.

135543551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135543551 is a deficient number, since it is larger than the sum of its proper divisors (23696593).

135543551 is a wasteful number, since it uses less digits than its factorization.

135543551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947881.

The product of its digits is 22500, while the sum is 32.

The square root of 135543551 is about 11642.3172521625. The cubic root of 135543551 is about 513.6803502922.

The spelling of 135543551 in words is "one hundred thirty-five million, five hundred forty-three thousand, five hundred fifty-one".