206311293 has 20 divisors (see below), whose sum is σ = 318139008. Its totient is φ = 133102440.

The previous prime is 206311289. The next prime is 206311309. The reversal of 206311293 is 392113602.

206311293 is a `hidden beast` number, since 2 + 0 + 631 + 1 + 29 + 3 = 666.

It is not a de Polignac number, because 206311293 - 2² = 206311289 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206311243) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 38571 + ... + 43592.

Almost surely, 2^206311293 is an apocalyptic number.

It is an amenable number.

206311293 is a deficient number, since it is larger than the sum of its proper divisors (111827715).

206311293 is an equidigital number, since it uses as much as digits as its factorization.

206311293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82206 (or 82197 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 206311293 is about 14363.5404061812. The cubic root of 206311293 is about 590.8913969835.

Adding to 206311293 its reverse (392113602), we get a palindrome (598424895).

The spelling of 206311293 in words is "two hundred six million, three hundred eleven thousand, two hundred ninety-three".