2555534221 has 2 divisors, whose sum is σ = 2555534222. Its totient is φ = 2555534220.

The previous prime is 2555534207. The next prime is 2555534269. The reversal of 2555534221 is 1224355552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1779911721 + 775622500 = 42189^2 + 27850^2 .

It is a cyclic number.

It is not a de Polignac number, because 2555534221 - 2⁹ = 2555533709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2555534291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277767110 + 1277767111.

It is an arithmetic number, because the mean of its divisors is an integer number (1277767111).

Almost surely, 2^2555534221 is an apocalyptic number.

It is an amenable number.

2555534221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2555534221 is an equidigital number, since it uses as much as digits as its factorization.

2555534221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60000, while the sum is 34.

The square root of 2555534221 is about 50552.2919460631. The cubic root of 2555534221 is about 1367.1848386546.

Adding to 2555534221 its reverse (1224355552), we get a palindrome (3779889773).

The spelling of 2555534221 in words is "two billion, five hundred fifty-five million, five hundred thirty-four thousand, two hundred twenty-one".