135435221 has 8 divisors (see below), whose sum is σ = 137995200. Its totient is φ = 132894432.

The previous prime is 135435197. The next prime is 135435239. The reversal of 135435221 is 122534531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135435221 - 2¹⁴ = 135418837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135432221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9866 + ... + 19188.

It is an arithmetic number, because the mean of its divisors is an integer number (17249400).

Almost surely, 2^135435221 is an apocalyptic number.

It is an amenable number.

135435221 is a deficient number, since it is larger than the sum of its proper divisors (2559979).

135435221 is an equidigital number, since it uses as much as digits as its factorization.

135435221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9595.

The product of its digits is 3600, while the sum is 26.

The square root of 135435221 is about 11637.6638978792. The cubic root of 135435221 is about 513.5434648327.

Adding to 135435221 its reverse (122534531), we get a palindrome (257969752).

The spelling of 135435221 in words is "one hundred thirty-five million, four hundred thirty-five thousand, two hundred twenty-one".