135054221 has 2 divisors, whose sum is σ = 135054222. Its totient is φ = 135054220.

The previous prime is 135054217. The next prime is 135054233. The reversal of 135054221 is 122450531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84088900 + 50965321 = 9170^2 + 7139^2 .

It is a cyclic number.

It is not a de Polignac number, because 135054221 - 2² = 135054217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135054251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67527110 + 67527111.

It is an arithmetic number, because the mean of its divisors is an integer number (67527111).

Almost surely, 2^135054221 is an apocalyptic number.

It is an amenable number.

135054221 is a deficient number, since it is larger than the sum of its proper divisors (1).

135054221 is an equidigital number, since it uses as much as digits as its factorization.

135054221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 135054221 is about 11621.2831047178. The cubic root of 135054221 is about 513.0614537777.

The spelling of 135054221 in words is "one hundred thirty-five million, fifty-four thousand, two hundred twenty-one".