135431055 has 16 divisors (see below), whose sum is σ = 240766560. Its totient is φ = 72229824.

The previous prime is 135431029. The next prime is 135431071. The reversal of 135431055 is 550134531.

135431055 is a `hidden beast` number, since 13 + 543 + 105 + 5 = 666.

It is not a de Polignac number, because 135431055 - 2⁶ = 135430991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 501462 + ... + 501731.

It is an arithmetic number, because the mean of its divisors is an integer number (15047910).

Almost surely, 2^135431055 is an apocalyptic number.

135431055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135431055 is a deficient number, since it is larger than the sum of its proper divisors (105335505).

135431055 is a wasteful number, since it uses less digits than its factorization.

135431055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003207 (or 1003201 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 135431055 is about 11637.4849086905. The cubic root of 135431055 is about 513.5381992304.

Adding to 135431055 its reverse (550134531), we get a palindrome (685565586).

The spelling of 135431055 in words is "one hundred thirty-five million, four hundred thirty-one thousand, fifty-five".