206631293 has 8 divisors (see below), whose sum is σ = 233189280. Its totient is φ = 181368880.

The previous prime is 206631221. The next prime is 206631301. The reversal of 206631293 is 392136602.

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

It is not a de Polignac number, because 206631293 - 2²² = 202436989 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 (206630293) 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, 323555 + ... + 324192.

It is an arithmetic number, because the mean of its divisors is an integer number (29148660).

Almost surely, 2^206631293 is an apocalyptic number.

It is an amenable number.

206631293 is a deficient number, since it is larger than the sum of its proper divisors (26557987).

206631293 is a wasteful number, since it uses less digits than its factorization.

206631293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647787.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 206631293 is about 14374.6754050309. The cubic root of 206631293 is about 591.1967406997.

Adding to 206631293 its reverse (392136602), we get a palindrome (598767895).

The spelling of 206631293 in words is "two hundred six million, six hundred thirty-one thousand, two hundred ninety-three".