213284307 has 4 divisors (see below), whose sum is σ = 284379080. Its totient is φ = 142189536.

The previous prime is 213284303. The next prime is 213284341. The reversal of 213284307 is 703482312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 213284307 - 2² = 213284303 is a prime.

It is a super-2 number, since 2×213284307² = 90980391224940498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213284303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35547382 + ... + 35547387.

It is an arithmetic number, because the mean of its divisors is an integer number (71094770).

Almost surely, 2^213284307 is an apocalyptic number.

213284307 is a deficient number, since it is larger than the sum of its proper divisors (71094773).

213284307 is an equidigital number, since it uses as much as digits as its factorization.

213284307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71094772.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 213284307 is about 14604.2564685779. The cubic root of 213284307 is about 597.4748571086.

The spelling of 213284307 in words is "two hundred thirteen million, two hundred eighty-four thousand, three hundred seven".