206047031 has 2 divisors, whose sum is σ = 206047032. Its totient is φ = 206047030.

The previous prime is 206047027. The next prime is 206047069. The reversal of 206047031 is 130740602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206047031 - 2² = 206047027 is a prime.

It is a super-2 number, since 2×206047031² = 84910757967829922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 206046988 and 206047006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206047091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103023515 + 103023516.

It is an arithmetic number, because the mean of its divisors is an integer number (103023516).

Almost surely, 2^206047031 is an apocalyptic number.

206047031 is a deficient number, since it is larger than the sum of its proper divisors (1).

206047031 is an equidigital number, since it uses as much as digits as its factorization.

206047031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 206047031 is about 14354.3384034235. The cubic root of 206047031 is about 590.6390002971.

Adding to 206047031 its reverse (130740602), we get a palindrome (336787633).

The spelling of 206047031 in words is "two hundred six million, forty-seven thousand, thirty-one".