208116031 has 2 divisors, whose sum is σ = 208116032. Its totient is φ = 208116030.

The previous prime is 208116017. The next prime is 208116037. The reversal of 208116031 is 130611802.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208116031 is a prime.

It is a super-2 number, since 2×208116031² = 86624564718385922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 208115993 and 208116011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208116037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104058015 + 104058016.

It is an arithmetic number, because the mean of its divisors is an integer number (104058016).

Almost surely, 2^208116031 is an apocalyptic number.

208116031 is a deficient number, since it is larger than the sum of its proper divisors (1).

208116031 is an equidigital number, since it uses as much as digits as its factorization.

208116031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 208116031 is about 14426.2271921664. The cubic root of 208116031 is about 592.6093667210.

Adding to 208116031 its reverse (130611802), we get a palindrome (338727833).

The spelling of 208116031 in words is "two hundred eight million, one hundred sixteen thousand, thirty-one".