135243531 has 6 divisors (see below), whose sum is σ = 195351780. Its totient is φ = 90162348.

The previous prime is 135243529. The next prime is 135243541. The reversal of 135243531 is 135342531.

It is not a de Polignac number, because 135243531 - 2¹ = 135243529 is a prime.

It is a super-2 number, since 2×135243531² = 36581625354695922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135243495 and 135243504.

It is not an unprimeable number, because it can be changed into a prime (135243541) 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 5 ways as a sum of consecutive naturals, for example, 7513521 + ... + 7513538.

It is an arithmetic number, because the mean of its divisors is an integer number (32558630).

Almost surely, 2^135243531 is an apocalyptic number.

135243531 is a deficient number, since it is larger than the sum of its proper divisors (60108249).

135243531 is a wasteful number, since it uses less digits than its factorization.

135243531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15027065 (or 15027062 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 135243531 is about 11629.4252222541. The cubic root of 135243531 is about 513.3010669642.

The spelling of 135243531 in words is "one hundred thirty-five million, two hundred forty-three thousand, five hundred thirty-one".