216624049 has 2 divisors, whose sum is σ = 216624050. Its totient is φ = 216624048.

The previous prime is 216624041. The next prime is 216624059. The reversal of 216624049 is 940426612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210830400 + 5793649 = 14520^2 + 2407^2 .

It is a cyclic number.

It is not a de Polignac number, because 216624049 - 2³ = 216624041 is a prime.

It is not a weakly prime, because it can be changed into another prime (216624041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108312024 + 108312025.

It is an arithmetic number, because the mean of its divisors is an integer number (108312025).

Almost surely, 2^216624049 is an apocalyptic number.

It is an amenable number.

216624049 is a deficient number, since it is larger than the sum of its proper divisors (1).

216624049 is an equidigital number, since it uses as much as digits as its factorization.

216624049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 216624049 is about 14718.1537225292. The cubic root of 216624049 is about 600.5772675736.

The spelling of 216624049 in words is "two hundred sixteen million, six hundred twenty-four thousand, forty-nine".