135467221 has 2 divisors, whose sum is σ = 135467222. Its totient is φ = 135467220.

The previous prime is 135467201. The next prime is 135467251. The reversal of 135467221 is 122764531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135466321 + 900 = 11639^2 + 30^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135467221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135467201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67733610 + 67733611.

It is an arithmetic number, because the mean of its divisors is an integer number (67733611).

Almost surely, 2^135467221 is an apocalyptic number.

It is an amenable number.

135467221 is a deficient number, since it is larger than the sum of its proper divisors (1).

135467221 is an equidigital number, since it uses as much as digits as its factorization.

135467221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 135467221 is about 11639.0386630512. The cubic root of 135467221 is about 513.5839075296.

The spelling of 135467221 in words is "one hundred thirty-five million, four hundred sixty-seven thousand, two hundred twenty-one".