218199307 has 2 divisors, whose sum is σ = 218199308. Its totient is φ = 218199306.

The previous prime is 218199299. The next prime is 218199341. The reversal of 218199307 is 703991812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218199307 - 2³ = 218199299 is a prime.

It is a super-2 number, since 2×218199307² = 95221875150560498, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218199307.

It is not a weakly prime, because it can be changed into another prime (218199347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109099653 + 109099654.

It is an arithmetic number, because the mean of its divisors is an integer number (109099654).

Almost surely, 2^218199307 is an apocalyptic number.

218199307 is a deficient number, since it is larger than the sum of its proper divisors (1).

218199307 is an equidigital number, since it uses as much as digits as its factorization.

218199307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 218199307 is about 14771.5709049512. The cubic root of 218199307 is about 602.0295226928.

The spelling of 218199307 in words is "two hundred eighteen million, one hundred ninety-nine thousand, three hundred seven".