205783213 has 4 divisors (see below), whose sum is σ = 206022528. Its totient is φ = 205543900.

The previous prime is 205783199. The next prime is 205783247. The reversal of 205783213 is 312387502.

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 205783213 - 2¹⁷ = 205652141 is a prime.

It is a super-3 number, since 3×205783213³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205783273) 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, 118363 + ... + 120088.

It is an arithmetic number, because the mean of its divisors is an integer number (51505632).

Almost surely, 2^205783213 is an apocalyptic number.

It is an amenable number.

205783213 is a deficient number, since it is larger than the sum of its proper divisors (239315).

205783213 is an equidigital number, since it uses as much as digits as its factorization.

205783213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239314.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 205783213 is about 14345.1459734643. The cubic root of 205783213 is about 590.3868123222.

The spelling of 205783213 in words is "two hundred five million, seven hundred eighty-three thousand, two hundred thirteen".