206431162031 has 4 divisors (see below), whose sum is σ = 211466068464. Its totient is φ = 201396255600.

The previous prime is 206431161997. The next prime is 206431162037. The reversal of 206431162031 is 130261134602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130261134602 = 2 ⋅65130567301.

It is a cyclic number.

It is not a de Polignac number, because 206431162031 - 2⁶ = 206431161967 is a prime.

It is a super-2 number, since 2×206431162031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206431161985 and 206431162003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206431162037) 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, 2517453155 + ... + 2517453236.

It is an arithmetic number, because the mean of its divisors is an integer number (52866517116).

Almost surely, 2^206431162031 is an apocalyptic number.

206431162031 is a deficient number, since it is larger than the sum of its proper divisors (5034906433).

206431162031 is an equidigital number, since it uses as much as digits as its factorization.

206431162031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5034906432.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 206431162031 its reverse (130261134602), we get a palindrome (336692296633).

The spelling of 206431162031 in words is "two hundred six billion, four hundred thirty-one million, one hundred sixty-two thousand, thirty-one".