213042306 has 8 divisors (see below), whose sum is σ = 426084624. Its totient is φ = 71014100.

The previous prime is 213042299. The next prime is 213042311. The reversal of 213042306 is 603240312.

It is a happy number.

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

213042306 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17753520 + ... + 17753531.

It is an arithmetic number, because the mean of its divisors is an integer number (53260578).

Almost surely, 2^213042306 is an apocalyptic number.

213042306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213042306 is a wasteful number, since it uses less digits than its factorization.

213042306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35507056.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 213042306 is about 14595.9688270426. The cubic root of 213042306 is about 597.2487985436.

Adding to 213042306 its reverse (603240312), we get a palindrome (816282618).

The spelling of 213042306 in words is "two hundred thirteen million, forty-two thousand, three hundred six".