135554531 has 12 divisors (see below), whose sum is σ = 165986280. Its totient is φ = 110073600.

The previous prime is 135554519. The next prime is 135554563. The reversal of 135554531 is 135455531.

It is not a de Polignac number, because 135554531 - 2¹⁰ = 135553507 is a prime.

It is a super-2 number, since 2×135554531² = 36750061749259922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135554581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71870 + ... + 73731.

It is an arithmetic number, because the mean of its divisors is an integer number (13832190).

Almost surely, 2^135554531 is an apocalyptic number.

135554531 is a deficient number, since it is larger than the sum of its proper divisors (30431749).

135554531 is a wasteful number, since it uses less digits than its factorization.

135554531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145634 (or 145627 counting only the distinct ones).

The product of its digits is 22500, while the sum is 32.

The square root of 135554531 is about 11642.7887982218. The cubic root of 135554531 is about 513.6942205155.

The spelling of 135554531 in words is "one hundred thirty-five million, five hundred fifty-four thousand, five hundred thirty-one".