135564221 has 8 divisors (see below), whose sum is σ = 153676320. Its totient is φ = 118549872.

The previous prime is 135564211. The next prime is 135564229. The reversal of 135564221 is 122465531.

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 135564221 - 2⁶ = 135564157 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 (135564229) 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 7 ways as a sum of consecutive naturals, for example, 274175 + ... + 274668.

It is an arithmetic number, because the mean of its divisors is an integer number (19209540).

Almost surely, 2^135564221 is an apocalyptic number.

It is an amenable number.

135564221 is a deficient number, since it is larger than the sum of its proper divisors (18112099).

135564221 is a wasteful number, since it uses less digits than its factorization.

135564221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548875.

The product of its digits is 7200, while the sum is 29.

The square root of 135564221 is about 11643.2049281974. The cubic root of 135564221 is about 513.7064605548.

The spelling of 135564221 in words is "one hundred thirty-five million, five hundred sixty-four thousand, two hundred twenty-one".