217053307 has 2 divisors, whose sum is σ = 217053308. Its totient is φ = 217053306.

The previous prime is 217053257. The next prime is 217053329. The reversal of 217053307 is 703350712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 217053307 - 2²⁷ = 82835579 is a prime.

It is a super-2 number, since 2×217053307² = 94224276159272498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (217054307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108526653 + 108526654.

It is an arithmetic number, because the mean of its divisors is an integer number (108526654).

Almost surely, 2^217053307 is an apocalyptic number.

217053307 is a deficient number, since it is larger than the sum of its proper divisors (1).

217053307 is an equidigital number, since it uses as much as digits as its factorization.

217053307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 217053307 is about 14732.7291090280. The cubic root of 217053307 is about 600.9737032411.

The spelling of 217053307 in words is "two hundred seventeen million, fifty-three thousand, three hundred seven".