308116221 has 16 divisors (see below), whose sum is σ = 470874624. Its totient is φ = 175554864.

The previous prime is 308116187. The next prime is 308116243. The reversal of 308116221 is 122611803.

It is not a de Polignac number, because 308116221 - 2²³ = 299727613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 308116191 and 308116200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308116021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13855 + ... + 28428.

It is an arithmetic number, because the mean of its divisors is an integer number (29429664).

Almost surely, 2^308116221 is an apocalyptic number.

It is an amenable number.

308116221 is a deficient number, since it is larger than the sum of its proper divisors (162758403).

308116221 is a wasteful number, since it uses less digits than its factorization.

308116221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42640.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 308116221 is about 17553.2396155240. The cubic root of 308116221 is about 675.4162743682.

The spelling of 308116221 in words is "three hundred eight million, one hundred sixteen thousand, two hundred twenty-one".