36615000221 has 2 divisors, whose sum is σ = 36615000222. Its totient is φ = 36615000220.

The previous prime is 36615000199. The next prime is 36615000229. The reversal of 36615000221 is 12200051663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36199248121 + 415752100 = 190261^2 + 20390^2 .

It is a cyclic number.

It is not a de Polignac number, because 36615000221 - 2²⁶ = 36547891357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36615000229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18307500110 + 18307500111.

It is an arithmetic number, because the mean of its divisors is an integer number (18307500111).

Almost surely, 2^36615000221 is an apocalyptic number.

It is an amenable number.

36615000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

36615000221 is an equidigital number, since it uses as much as digits as its factorization.

36615000221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 36615000221 its reverse (12200051663), we get a palindrome (48815051884).

The spelling of 36615000221 in words is "thirty-six billion, six hundred fifteen million, two hundred twenty-one", and thus it is an aban number.