36555342221 has 2 divisors, whose sum is σ = 36555342222. Its totient is φ = 36555342220.

The previous prime is 36555342167. The next prime is 36555342227. The reversal of 36555342221 is 12224355563.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36381366121 + 173976100 = 190739^2 + 13190^2 .

It is a cyclic number.

It is not a de Polignac number, because 36555342221 - 2⁶ = 36555342157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36555342227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18277671110 + 18277671111.

It is an arithmetic number, because the mean of its divisors is an integer number (18277671111).

Almost surely, 2^36555342221 is an apocalyptic number.

It is an amenable number.

36555342221 is a deficient number, since it is larger than the sum of its proper divisors (1).

36555342221 is an equidigital number, since it uses as much as digits as its factorization.

36555342221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216000, while the sum is 38.

Adding to 36555342221 its reverse (12224355563), we get a palindrome (48779697784).

It can be divided in two parts, 36555342 and 221, that added together give a palindrome (36555563).

The spelling of 36555342221 in words is "thirty-six billion, five hundred fifty-five million, three hundred forty-two thousand, two hundred twenty-one".