135850221 has 12 divisors (see below), whose sum is σ = 211322748. Its totient is φ = 83600064.

The previous prime is 135850207. The next prime is 135850271. The reversal of 135850221 is 122058531.

It is a happy number.

135850221 is a `hidden beast` number, since 135 + 8 + 502 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 53494596 + 82355625 = 7314^2 + 9075^2 .

It is not a de Polignac number, because 135850221 - 2⁶ = 135850157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135850271) 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 11 ways as a sum of consecutive naturals, for example, 580440 + ... + 580673.

It is an arithmetic number, because the mean of its divisors is an integer number (17610229).

Almost surely, 2^135850221 is an apocalyptic number.

It is an amenable number.

135850221 is a deficient number, since it is larger than the sum of its proper divisors (75472527).

135850221 is a wasteful number, since it uses less digits than its factorization.

135850221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161132 (or 1161129 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 135850221 is about 11655.4802989838. The cubic root of 135850221 is about 514.0674625174.

The spelling of 135850221 in words is "one hundred thirty-five million, eight hundred fifty thousand, two hundred twenty-one".