305009217 has 12 divisors (see below), whose sum is σ = 454781184. Its totient is φ = 196779960.

The previous prime is 305009203. The next prime is 305009249. The reversal of 305009217 is 712900503.

It is not a de Polignac number, because 305009217 - 2¹⁴ = 304992833 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (305009017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 546333 + ... + 546890.

It is an arithmetic number, because the mean of its divisors is an integer number (37898432).

Almost surely, 2^305009217 is an apocalyptic number.

It is an amenable number.

305009217 is a deficient number, since it is larger than the sum of its proper divisors (149771967).

305009217 is a wasteful number, since it uses less digits than its factorization.

305009217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093260 (or 1093257 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 305009217 is about 17464.5130765218. The cubic root of 305009217 is about 673.1383302631.

The spelling of 305009217 in words is "three hundred five million, nine thousand, two hundred seventeen".