216303349 has 2 divisors, whose sum is σ = 216303350. Its totient is φ = 216303348.

The previous prime is 216303341. The next prime is 216303361. The reversal of 216303349 is 943303612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136469124 + 79834225 = 11682^2 + 8935^2 .

It is a cyclic number.

It is not a de Polignac number, because 216303349 - 2³ = 216303341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216303349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216303341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108151674 + 108151675.

It is an arithmetic number, because the mean of its divisors is an integer number (108151675).

Almost surely, 2^216303349 is an apocalyptic number.

It is an amenable number.

216303349 is a deficient number, since it is larger than the sum of its proper divisors (1).

216303349 is an equidigital number, since it uses as much as digits as its factorization.

216303349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 216303349 is about 14707.2549784112. The cubic root of 216303349 is about 600.2807473181.

The spelling of 216303349 in words is "two hundred sixteen million, three hundred three thousand, three hundred forty-nine".