534666221 has 2 divisors, whose sum is σ = 534666222. Its totient is φ = 534666220.

The previous prime is 534666191. The next prime is 534666227. The reversal of 534666221 is 122666435.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 522625321 + 12040900 = 22861^2 + 3470^2 .

It is a cyclic number.

It is not a de Polignac number, because 534666221 - 2¹⁴ = 534649837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (534666227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 267333110 + 267333111.

It is an arithmetic number, because the mean of its divisors is an integer number (267333111).

Almost surely, 2^534666221 is an apocalyptic number.

It is an amenable number.

534666221 is a deficient number, since it is larger than the sum of its proper divisors (1).

534666221 is an equidigital number, since it uses as much as digits as its factorization.

534666221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 35.

The square root of 534666221 is about 23122.8506244364. The cubic root of 534666221 is about 811.6352784016.

The spelling of 534666221 in words is "five hundred thirty-four million, six hundred sixty-six thousand, two hundred twenty-one".