206424336631 has 2 divisors, whose sum is σ = 206424336632. Its totient is φ = 206424336630.

The previous prime is 206424336589. The next prime is 206424336709. The reversal of 206424336631 is 136633424602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206424336631 is a prime.

It is a super-2 number, since 2×206424336631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206424336931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103212168315 + 103212168316.

It is an arithmetic number, because the mean of its divisors is an integer number (103212168316).

Almost surely, 2^206424336631 is an apocalyptic number.

206424336631 is a deficient number, since it is larger than the sum of its proper divisors (1).

206424336631 is an equidigital number, since it uses as much as digits as its factorization.

206424336631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 40.

The spelling of 206424336631 in words is "two hundred six billion, four hundred twenty-four million, three hundred thirty-six thousand, six hundred thirty-one".