3616311221 has 2 divisors, whose sum is σ = 3616311222. Its totient is φ = 3616311220.

The previous prime is 3616311197. The next prime is 3616311227. The reversal of 3616311221 is 1221136163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2965347025 + 650964196 = 54455^2 + 25514^2 .

It is a cyclic number.

It is not a de Polignac number, because 3616311221 - 2¹⁰ = 3616310197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3616311227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1808155610 + 1808155611.

It is an arithmetic number, because the mean of its divisors is an integer number (1808155611).

Almost surely, 2^3616311221 is an apocalyptic number.

It is an amenable number.

3616311221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3616311221 is an equidigital number, since it uses as much as digits as its factorization.

3616311221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 3616311221 is about 60135.7732219350. The cubic root of 3616311221 is about 1534.9300892308.

Adding to 3616311221 its reverse (1221136163), we get a palindrome (4837447384).

The spelling of 3616311221 in words is "three billion, six hundred sixteen million, three hundred eleven thousand, two hundred twenty-one".