135131553 has 24 divisors (see below), whose sum is σ = 207960480. Its totient is φ = 84309120.

The previous prime is 135131539. The next prime is 135131567. The reversal of 135131553 is 355131531.

It is an interprime number because it is at equal distance from previous prime (135131539) and next prime (135131567).

It is not a de Polignac number, because 135131553 - 2⁴ = 135131537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135131053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9433 + ... + 18953.

It is an arithmetic number, because the mean of its divisors is an integer number (8665020).

Almost surely, 2^135131553 is an apocalyptic number.

It is an amenable number.

135131553 is a deficient number, since it is larger than the sum of its proper divisors (72828927).

135131553 is a wasteful number, since it uses less digits than its factorization.

135131553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9629 (or 9626 counting only the distinct ones).

The product of its digits is 3375, while the sum is 27.

The square root of 135131553 is about 11624.6097999030. The cubic root of 135131553 is about 513.1593613628.

The spelling of 135131553 in words is "one hundred thirty-five million, one hundred thirty-one thousand, five hundred fifty-three".