135834221 has 2 divisors, whose sum is σ = 135834222. Its totient is φ = 135834220.

The previous prime is 135834197. The next prime is 135834269. The reversal of 135834221 is 122438531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74822500 + 61011721 = 8650^2 + 7811^2 .

It is a cyclic number.

It is not a de Polignac number, because 135834221 - 2¹⁴ = 135817837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135834421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67917110 + 67917111.

It is an arithmetic number, because the mean of its divisors is an integer number (67917111).

Almost surely, 2^135834221 is an apocalyptic number.

It is an amenable number.

135834221 is a deficient number, since it is larger than the sum of its proper divisors (1).

135834221 is an equidigital number, since it uses as much as digits as its factorization.

135834221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 135834221 is about 11654.7939063717. The cubic root of 135834221 is about 514.0472799902.

The spelling of 135834221 in words is "one hundred thirty-five million, eight hundred thirty-four thousand, two hundred twenty-one".