135552531 has 4 divisors (see below), whose sum is σ = 180736712. Its totient is φ = 90368352.

The previous prime is 135552523. The next prime is 135552533. The reversal of 135552531 is 135255531.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 135552531 - 2³ = 135552523 is a prime.

It is a super-2 number, since 2×135552531² = 36748977321011922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135552533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22592086 + ... + 22592091.

It is an arithmetic number, because the mean of its divisors is an integer number (45184178).

Almost surely, 2^135552531 is an apocalyptic number.

135552531 is a deficient number, since it is larger than the sum of its proper divisors (45184181).

135552531 is an equidigital number, since it uses as much as digits as its factorization.

135552531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45184180.

The product of its digits is 11250, while the sum is 30.

The square root of 135552531 is about 11642.7029078303. The cubic root of 135552531 is about 513.6916941189.

The spelling of 135552531 in words is "one hundred thirty-five million, five hundred fifty-two thousand, five hundred thirty-one".