213840005 has 8 divisors (see below), whose sum is σ = 257040000. Its totient is φ = 170784016.

The previous prime is 213839999. The next prime is 213840017. The reversal of 213840005 is 500048312.

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

It is a cyclic number.

It is not a de Polignac number, because 213840005 - 2⁸ = 213839749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32705 + ... + 38694.

It is an arithmetic number, because the mean of its divisors is an integer number (32130000).

Almost surely, 2^213840005 is an apocalyptic number.

It is an amenable number.

213840005 is a deficient number, since it is larger than the sum of its proper divisors (43199995).

213840005 is an equidigital number, since it uses as much as digits as its factorization.

213840005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72003.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 213840005 is about 14623.2692993051. The cubic root of 213840005 is about 597.9933007083.

Adding to 213840005 its reverse (500048312), we get a palindrome (713888317).

The spelling of 213840005 in words is "two hundred thirteen million, eight hundred forty thousand, five".