213009117 has 4 divisors (see below), whose sum is σ = 284012160. Its totient is φ = 142006076.

The previous prime is 213009113. The next prime is 213009127. The reversal of 213009117 is 711900312.

213009117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 213009117 - 2² = 213009113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213009113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35501517 + ... + 35501522.

It is an arithmetic number, because the mean of its divisors is an integer number (71003040).

Almost surely, 2^213009117 is an apocalyptic number.

It is an amenable number.

213009117 is a deficient number, since it is larger than the sum of its proper divisors (71003043).

213009117 is an equidigital number, since it uses as much as digits as its factorization.

213009117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71003042.

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 213009117 is about 14594.8318592576. The cubic root of 213009117 is about 597.2177826073.

Adding to 213009117 its reverse (711900312), we get a palindrome (924909429).

The spelling of 213009117 in words is "two hundred thirteen million, nine thousand, one hundred seventeen".