135695221 has 4 divisors (see below), whose sum is σ = 137995200. Its totient is φ = 133395244.

The previous prime is 135695201. The next prime is 135695249. The reversal of 135695221 is 122596531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135695221 - 2¹⁵ = 135662453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135695201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1149901 + ... + 1150018.

It is an arithmetic number, because the mean of its divisors is an integer number (34498800).

Almost surely, 2^135695221 is an apocalyptic number.

It is an amenable number.

135695221 is a deficient number, since it is larger than the sum of its proper divisors (2299979).

135695221 is an equidigital number, since it uses as much as digits as its factorization.

135695221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299978.

The product of its digits is 16200, while the sum is 34.

The square root of 135695221 is about 11648.8291686332. The cubic root of 135695221 is about 513.8718775576.

The spelling of 135695221 in words is "one hundred thirty-five million, six hundred ninety-five thousand, two hundred twenty-one".