27550083221 has 2 divisors, whose sum is σ = 27550083222. Its totient is φ = 27550083220.

The previous prime is 27550083181. The next prime is 27550083229. The reversal of 27550083221 is 12238005572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16918204900 + 10631878321 = 130070^2 + 103111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27550083221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27550083229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13775041610 + 13775041611.

It is an arithmetic number, because the mean of its divisors is an integer number (13775041611).

Almost surely, 2^27550083221 is an apocalyptic number.

It is an amenable number.

27550083221 is a deficient number, since it is larger than the sum of its proper divisors (1).

27550083221 is an equidigital number, since it uses as much as digits as its factorization.

27550083221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 35.

Adding to 27550083221 its reverse (12238005572), we get a palindrome (39788088793).

The spelling of 27550083221 in words is "twenty-seven billion, five hundred fifty million, eighty-three thousand, two hundred twenty-one".