135532531 has 4 divisors (see below), whose sum is σ = 135650232. Its totient is φ = 135414832.

The previous prime is 135532489. The next prime is 135532541. The reversal of 135532531 is 135235531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135235531 = 6653 ⋅20327.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135532531 is a prime.

It is a super-2 number, since 2×135532531² = 36738133918531922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135532531.

It is not an unprimeable number, because it can be changed into a prime (135532541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57106 + ... + 59431.

It is an arithmetic number, because the mean of its divisors is an integer number (33912558).

Almost surely, 2^135532531 is an apocalyptic number.

135532531 is a deficient number, since it is larger than the sum of its proper divisors (117701).

135532531 is a wasteful number, since it uses less digits than its factorization.

135532531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117700.

The product of its digits is 6750, while the sum is 28.

The square root of 135532531 is about 11641.8439690626. The cubic root of 135532531 is about 513.6664287867. Note that the first 3 decimals are identical.

The spelling of 135532531 in words is "one hundred thirty-five million, five hundred thirty-two thousand, five hundred thirty-one".