213406243 has 8 divisors (see below), whose sum is σ = 217191456. Its totient is φ = 209630400.

The previous prime is 213406199. The next prime is 213406279. The reversal of 213406243 is 342604312.

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 213406243 - 2¹³ = 213398051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213406943) 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, 56298 + ... + 59968.

It is an arithmetic number, because the mean of its divisors is an integer number (27148932).

Almost surely, 2^213406243 is an apocalyptic number.

213406243 is a deficient number, since it is larger than the sum of its proper divisors (3785213).

213406243 is an equidigital number, since it uses as much as digits as its factorization.

213406243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 213406243 is about 14608.4305454077. The cubic root of 213406243 is about 597.5886954807.

The spelling of 213406243 in words is "two hundred thirteen million, four hundred six thousand, two hundred forty-three".