135323531 has 16 divisors (see below), whose sum is σ = 158000064. Its totient is φ = 113508864.

The previous prime is 135323527. The next prime is 135323533.

135323531 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 135323531 - 2² = 135323527 is a prime.

It is a super-2 number, since 2×135323531² = 36624916084615922, 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 135323531.

It is not an unprimeable number, because it can be changed into a prime (135323533) 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 15 ways as a sum of consecutive naturals, for example, 69041 + ... + 70973.

It is an arithmetic number, because the mean of its divisors is an integer number (9875004).

Almost surely, 2^135323531 is an apocalyptic number.

135323531 is a deficient number, since it is larger than the sum of its proper divisors (22676533).

135323531 is a wasteful number, since it uses less digits than its factorization.

135323531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150.

The product of its digits is 4050, while the sum is 26.

The square root of 135323531 is about 11632.8642646598. The cubic root of 135323531 is about 513.4022572415.

The spelling of 135323531 in words is "one hundred thirty-five million, three hundred twenty-three thousand, five hundred thirty-one".