206631313 has 8 divisors (see below), whose sum is σ = 236701440. Its totient is φ = 176699040.

The previous prime is 206631307. The next prime is 206631319. The reversal of 206631313 is 313136602.

It is an interprime number because it is at equal distance from previous prime (206631307) and next prime (206631319).

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

It is a de Polignac number, because none of the positive numbers 2^k-206631313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206631319) 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, 31228 + ... + 37261.

It is an arithmetic number, because the mean of its divisors is an integer number (29587680).

Almost surely, 2^206631313 is an apocalyptic number.

It is an amenable number.

206631313 is a deficient number, since it is larger than the sum of its proper divisors (30070127).

206631313 is an equidigital number, since it uses as much as digits as its factorization.

206631313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68927.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 206631313 is about 14374.6761006988. The cubic root of 206631313 is about 591.1967597739.

Adding to 206631313 its reverse (313136602), we get a palindrome (519767915).

The spelling of 206631313 in words is "two hundred six million, six hundred thirty-one thousand, three hundred thirteen".