213286009 has 4 divisors (see below), whose sum is σ = 213610320. Its totient is φ = 212961700.

The previous prime is 213285973. The next prime is 213286027. The reversal of 213286009 is 900682312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213286009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213286069) 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, 161167 + ... + 162484.

It is an arithmetic number, because the mean of its divisors is an integer number (53402580).

Almost surely, 2^213286009 is an apocalyptic number.

It is an amenable number.

213286009 is a deficient number, since it is larger than the sum of its proper divisors (324311).

213286009 is an equidigital number, since it uses as much as digits as its factorization.

213286009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324310.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 213286009 is about 14604.3147391447. The cubic root of 213286009 is about 597.4764463793.

The spelling of 213286009 in words is "two hundred thirteen million, two hundred eighty-six thousand, nine".