213345009 has 24 divisors (see below), whose sum is σ = 320992672. Its totient is φ = 141600960.

The previous prime is 213344983. The next prime is 213345029. The reversal of 213345009 is 900543312.

It is not a de Polignac number, because 213345009 - 2⁸ = 213344753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213345029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56742 + ... + 60384.

Almost surely, 2^213345009 is an apocalyptic number.

It is an amenable number.

213345009 is a deficient number, since it is larger than the sum of its proper divisors (107647663).

213345009 is an equidigital number, since it uses as much as digits as its factorization.

213345009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3899 (or 3887 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 213345009 is about 14606.3345504613. The cubic root of 213345009 is about 597.5315333813.

The spelling of 213345009 in words is "two hundred thirteen million, three hundred forty-five thousand, nine".