213806807 has 8 divisors (see below), whose sum is σ = 231201216. Its totient is φ = 196947712.

The previous prime is 213806797. The next prime is 213806843. The reversal of 213806807 is 708608312.

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 213806807 - 2¹⁰ = 213805783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213806207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132998 + ... + 134595.

It is an arithmetic number, because the mean of its divisors is an integer number (28900152).

Almost surely, 2^213806807 is an apocalyptic number.

213806807 is a deficient number, since it is larger than the sum of its proper divisors (17394409).

213806807 is a wasteful number, since it uses less digits than its factorization.

213806807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267657.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 213806807 is about 14622.1341465601. The cubic root of 213806807 is about 597.9623535694.

The spelling of 213806807 in words is "two hundred thirteen million, eight hundred six thousand, eight hundred seven".