135520353 has 12 divisors (see below), whose sum is σ = 196373268. Its totient is φ = 90060000.

The previous prime is 135520351. The next prime is 135520373. The reversal of 135520353 is 353025531.

135520353 is a `hidden beast` number, since 135 + 520 + 3 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38044224 + 97476129 = 6168^2 + 9873^2 .

It is not a de Polignac number, because 135520353 - 2¹ = 135520351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135520351) 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, 20898 + ... + 26603.

It is an arithmetic number, because the mean of its divisors is an integer number (16364439).

Almost surely, 2^135520353 is an apocalyptic number.

It is an amenable number.

135520353 is a deficient number, since it is larger than the sum of its proper divisors (60852915).

135520353 is a wasteful number, since it uses less digits than its factorization.

135520353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47824 (or 47821 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 27.

The square root of 135520353 is about 11641.3209302038. The cubic root of 135520353 is about 513.6510435083.

Adding to 135520353 its reverse (353025531), we get a palindrome (488545884).

The spelling of 135520353 in words is "one hundred thirty-five million, five hundred twenty thousand, three hundred fifty-three".