213306005 has 8 divisors (see below), whose sum is σ = 279237024. Its totient is φ = 155131600.

The previous prime is 213306001. The next prime is 213306013. The reversal of 213306005 is 500603312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213306005 - 2² = 213306001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213306001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1939091 + ... + 1939200.

It is an arithmetic number, because the mean of its divisors is an integer number (34904628).

Almost surely, 2^213306005 is an apocalyptic number.

It is an amenable number.

213306005 is a deficient number, since it is larger than the sum of its proper divisors (65931019).

213306005 is a wasteful number, since it uses less digits than its factorization.

213306005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878307.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 213306005 is about 14604.9993153030. Note that the first 3 decimals coincide. The cubic root of 213306005 is about 597.4951173425.

Adding to 213306005 its sum of digits (20), we get a square (213306025 = 14605²).

Adding to 213306005 its reverse (500603312), we get a palindrome (713909317).

The spelling of 213306005 in words is "two hundred thirteen million, three hundred six thousand, five".