135755531 has 2 divisors, whose sum is σ = 135755532. Its totient is φ = 135755530.

The previous prime is 135755497. The next prime is 135755533. The reversal of 135755531 is 135557531.

135755531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135755531 is a prime.

It is a super-2 number, since 2×135755531² = 36859128394183922, which contains 22 as substring.

Together with 135755533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 135755491 and 135755500.

It is not a weakly prime, because it can be changed into another prime (135755533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67877765 + 67877766.

It is an arithmetic number, because the mean of its divisors is an integer number (67877766).

Almost surely, 2^135755531 is an apocalyptic number.

135755531 is a deficient number, since it is larger than the sum of its proper divisors (1).

135755531 is an equidigital number, since it uses as much as digits as its factorization.

135755531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39375, while the sum is 35.

The square root of 135755531 is about 11651.4175532422. The cubic root of 135755531 is about 513.9479967272.

The spelling of 135755531 in words is "one hundred thirty-five million, seven hundred fifty-five thousand, five hundred thirty-one".